Mattheus Hallaÿcher, Augusta (Augsburg), circa 1675.Fine and extremely rare silver spherical watch, the movement with pendulum regulator, fitted in a gimballed suspension.

C. Two piece spherical fully engraved with concentrical rows of formal decoration. Steel gimbal suspension. D. Gilt brass with Roman numerals, the centre engraved with scrolling foliage. Blued steel elaborated single hand. M. Gilt brass full plate, the ballasted back plate engraved with foliage decoration, fusee with chain, verge escapement, short brass bob pendulum.Signed on the back plate.Diam. 53 mm.

Henry Sully à Versailles Invenit 1721 et Fecit 1724.An important and only recently discovered eight day Marine Timekeeper of the historically famous small group made by Sully and termed by him Pendules à Levier. This example, for which evidence exists that it is almost certainly Sully's third such timepiece, is one of only two known to have survived. It is a remarkable work offering hour and quarter striking as well as calendar in addition to most of the extraordinary features described and illustrated in Sully's 295 pages work dedicated to LouisXV and entitled Description abrégée d'une Horloge d'une nouvelle invention pour la juste mesure du Temps en Mer? Par Henry Sully, Horloger de S.A.S Monseigneur Le Duc d'Orléans, Paris 1726.Pendule à Levier, described by Sully as "C", this clock, together with Sully's "A" and "B", Harrison's Nos. 1, 2, 3, 4 and 5, Pierre Le Roy's "A" and "S" and Ferdinand Berthoud's Horloges Marines No. 6 and No. 8, can be considered as one of the 12 most important early timekeepers related to the discovery of the Longitude at sea.

C. As found it stood upon a rectangular ebonised wooden display base of much more recent origin. The clock has now been rehoused in a wooden case suspended in brass gimbals in conformity with the system shown in plate 3 of Description abrégée d'une Horloge d'une nouvelle invention pour la juste mesure du Temps en Mer?, and as intended by Sully to be suspended from the deck-head of a ship. D. Circular dial with matted centre, engraved and silvered chapter ring with Roman numerals and outer Arabicminute ring, subsidiary seconds ring below Chapter XII and calendar aperture above Chapter VI. The blued steel hour hand began life in the characteristic French fleur-de-lys form but lost its "ears" in the post-Revolutionary period when any object, decoration, or inscription conceivably reminiscent of the French monarchy had to be destroyed or defaced under penalty of confiscation. M. The two train movement is very much in the English style, having sturdy brass plates separated by five latched pllars. The dial feet are attached to the movement by the same method. All latches are numbered, as are the pillar-ends. The movement plates have high-arched tops. The back arch encompasses the top half of a large circular "window" made to show off the large vertical balance and the two anti-friction wheels supporting the back balance pivot. The escapement is Sully's famous, two-plane, dead-beat, frictional-rest type which bears his name. The pallet-discs are made so as to be reversible on theirrbor, in order to offer a choice of two differing inclinations of impulse planes. The escape wheel teeth have been repeatedly recut and now are little more than pins. The plain brass balance, which has had a ring added to it to make it heavier, has no spring. It beats half seconds. Its arbor extends backwards to a cock behind the movement plate and carries a crank and a connecting-rod reaching downwards to support a horizontal lever (the levier) pivoted at one end and weighted at the other. Whenthe balance is in motion, then the lever is alternately raised and lowered by the connecting rod. The going train employs a fusee (without maintaining power) driven from a large barrel and powerful spring through a strong gut line. The striking train is driven by a going-barrel, and employs a two sided rack in the manner of Thiout. The hours are struck in passing from a single train and hammer upon a deep-toned bell and one-blow quarters upon another of higher pitch. There is a Strike/Silent levr in the dial high up on the right beyond the minute ring. The front pivot of the third pinion of the going-train, carries the seconds hand.Signed on the back plate: Henry Sully à Versailles Invenit 1721 et Fecit 1724.Scratched on the front plate under the dial : Enderlin de Bâle - fait en 1724 Pour Monsieur de Sully.Dim. 33 x 32 x 19,5 cm.

SULLY Henry.Description abrégée d'une Horloge d'une nouvelle invention, pour la juste mesure du temps en mer - Avec le jugement de l'Académie Royale des Sciences sur cette invention et une Dissertation sur la nature des tentatives pour la Découverte des Longitudes dans la Navigation, & sur l'usage des Horloges, pour la mesure du Temps en Mer.

Paris, janvier 1726In 4°, 294 pp + errata and folding plates.Full calf, ribbed back with inlaid remaining of the original binding.

SULLY (Henry). Règle Artificielle du Temps. Nouvelle Edition corrigée & augmentée de quelques Mémoires sur l'Horlogerie, par M. Julien Le Roy.

Paris, 1737.8vo, 433 pp + index and 5 folding plates.Original full calf with ribbed back and tooled decoration.

French, circa 1770.Important and extremely rare watch with Sully frictional rest escapement, constructed on the principle of the watch elaborated in 1715 by Julien Le Roy and Henry Sully, constructed by Julien Le Roy and presented by Sully to the Académie des Sciences on June 10, 1716.

C. Silver gilt Louis XV with glazed back. D. Slightly later white enamel with radial Arabic numerals and outer minute ring. Later blued steel hands. M. Hinged gilt brass, fixed barrel with revolving arbor, three wheel train used in conjunction with a form of Sully's frictional rest escapement with double pallet and single escape wheel, so arranged that the balance staff is kept horizontal in both "hanging" and "lying" positions. Plain brass three-arm balance, flat balance spring.Diam. 47 mm.

Richard Gregg, London No. 591, attributable to Thomas Mudge, with London hallmarks for 1758.Very fine and important 22K gold pair cased double face watch with equation of time and annual calendar.

C. Double body outer and inner, both polished and marked "H.T.", the inner case with eccentric glazed calendar aperture. D. White enamel on the front with Roman numerals and outer Arabic minute ring. Small subsidiary revolving silver dial for the months partly covered by the gold small chapter ring of the dates which are pointed from the small revolving enamel centre. Gilt brass dust cap with calendar apertures. Blued steel "poker and beetle" hands, gold equation "poker" hand. M. Gilt brass fullplate with turned pillars, fusee with chain and maintaining power, cylinder escapement with brass escape wheel, polished steel plain three-arm balance with flat balance spring, gilt brass cock pierced and engraved with foliage and with diamond end-stone. Equation of time with differential and cam.Signed on the dust cap and back plate.Diam. 52 mm.

Josiah Emery, No. 661, produced in 1774.The first lever watch made by Josiah Emery, the second Lever Watch ever made after that executed by Thomas Mudge in 1769 for King George III.Gilt brass, pair cased, centre-seconds stop watch.

C. Gilt brass pair case, custom made circa 1795, both polished. D. White enamel with Roman numerals and outer minute and seconds ring, custom made from the same period than the case. Gilt brass hands.M. Hinged gilt brass full plate, regular English calibre, fusee with chain and Harrison's maintaining power, the mainspring set-up is of the type typically associated with Emery. Unusual arrangement of the centre-seconds driving wheel so that the centre seconds hands can be stopped independently from the movement. The train count determine a balance frequency of 36,000 beats per hour, extremely high frequency, probably unique for an 18th century watch. Lever escapement of experimental type withighly polished steel wheel of "flat wheel cylinder" type, the lever with simple pointed pallets, one jewelled, the other steel. The banking is achieved with extensions to the pallet arms which stop on top of the escape wheel teeth. There is apparently no draw on the pallets. The fork and roller action simply consists of two independently friction-mounted "D" section pieces on the staff, rotatable so that the shake in the fork can be adjusted closely. Plain gilt brass three-arm balance with two sall steel poising screws eccentrically mounted, and inset in the rim. Blued steel balance spring with a long straight tail, controlled by curb pins to effect the corrections for temperature changes by means of "Chelsea Bun" type compensation, the curb is mounted on a sliding steel frame, which can be racked sideways to adjust the watch for meantime, by moving the curb pins along the tail of the balance spring.Diam. 54 mm.

William Smith, London, H. Morton Invented,circa 1770.A rare, possibly unique centre seconds timekeeper of historical interest for use on board ship, mounted in a solid block of teak inset with a plaque inscribed "Sir John Franklin - Ships Clock from the North West Passage 1845-1847 - Mounted in a log of teak from H.M.S. Hindustan, a man-of-war, built entirely of wood, 1854".

C. Brass cylinder bowl within a rectangular solid piece of teak, hinged brass bezel. D. Brass with sunk centre, Roman numerals and outer Arabic minute ring. Pierced Louis XV blued steel hands. M. Brass circular with cylindrical pillars, fusee with chain and unusual maintaining power, Harrison type dead-beat verge escapement, brass three-arm balance, flat blued steel balance spring. Unusual brass "petal" pierced balance-bridge in the manner of Harrisons H5 and the Mudge copies.Signed on the dial.Dial diam. 25 cm.Dim. 40 x 30 x 12 cm.

J. H. de Magellan, London, circa 1780. A very rare small astronomical regulator, perhaps for a portable observatory.

D. Silvered brass regulator style with minutes at 12 o'clock and volvelle for the hours at 6 o'clock. Arabic seconds and minutes, Roman hour numerals. Blued steel hands. Signed 'J.H. de Magellan fieri Curavit Londini' (J.H. de Magellan caused it to be made in London). M. Brass with slightly tapering arched top plates, plain turned pillars, dead-beat anchor escapement with steel anchor, grooved barrel for the gut line, lateral pendulum adjustment, wood rod pendulum with brass bob, cylindrical bras cased weights.Signed on the dial.Dial diam. 20 cm.

Ferdinand Berthoud à Paris, circa 1770.Very fine and rare, month-going rose wood marquetry, weight-driven longcase regulator with equation of time.

C. Rectangular with glazed door, gilt bronze beaded decoration, applied five-pointed star on the base, with flambeau urn finial. D. White enamel by Coteau with Roman numerals, outer Arabic minute ring, gold paillonne five minute divisions, aperture below "XII" for the annual calendar. Pierced and engraved gilt brass hands with blued-steel centre-seconds and mean time minute hand. M. Rectangular brass with cylindrical pillars, weight-driven with Huygens endless rope winding, Graham dead-beat escaement, seconds beating pendulum with knife-edge suspension and Ferdinand Berthoud's special compensation with offset bob. The annual calendar ring with the equation cam, behind the dial.Signed on the dial and the back plate.Dim. 230 x 50 x 28 cm.

BERTHOUD (Ferdinand).Traité des Horloges Marines.

Paris, 1773.In 4°, 590 pp., 27 folding plates.Original full calf with ribbed back and tooled decoration.

EVEUX DE FLEURIEU (Charles Pierre Claret d'). Voyage fait par ordre du Roi en 1768 et 1769 à différentes parties du monde, pour éprouver en mer les Horloges Marines inventées par M. Ferdinand Berthoud.

Paris, 1773.In 4°, 2 volumes:Vol. I, 803 pp. + 79 pp. of introduction and Procès Verbal, and 5 folding maps.Vol. II, 622 pp. + 40 pp., 1 folding plate and 3 folding tables.Original full calf, the ribbed back with tooled decoration.

Attributable to Bouchet, circa 1780.Very fine and rare gilt brass eight day going skeleton centre seconds mantel regulator with equation of time, annual calendar, one 65 seconds remontoire and fixed gridiron compensation.

C. Rectangular sea-green marble base standing on gilt bronze engine-turned bun-feet. Gilt brass frame designed as an upside-down "Y" levelled by means of four screws with knurled buttons. D. White enamel chapter ring with Roman numerals. Gilt brass "arrow" hands and blued steel equation hand with gilt brass tip. Silvered annual chapter ring and equation cam, revolving beneath the dial. M. Going barrel associated with a 65 seconds remontoire, pin-wheel escapement, fixed gridiron compensation, hal-seconds beating pendulum with spring suspension.Dim. 42 x 18 x 13 mm.

Jn. R. Arnold, London, No. 151, circa 1790.Fine and rare, early small octagonal mahogany two day going marine chronometer.

C. Double body, octagonal, the cover with glazed aperture. D. Frosted silvered with Roman numerals, outer Arabic minute ring and subsidiary seconds. Blued steel pear hands. M. Brass full plate, relieved for the barrel, cylindrical pillars secured by pins, fusee with chain and maintaining power, Earnshaw type spring detent escapement, two-arm compensation balance with poising and timing screws, free sprung blued steel helical balance spring with terminal curves. Diamond end-stone.Signed on the dial and back plate.Dial diam. 80 mm.Dim. 135 x 70 mm.

Breguet No. 453, Pendule Pyramidale, Génie et Prudence, sold to Monsieur de Pourtales on October 22, 1806, for 3000 Francs.Extremely fine bronze and ormolu precision mantel regulator. One of the four precision clocks from the prestigious series of Pyramidales, made by Breguet with the magnificent bronze figures by Pierre-Philippe Thomire.

C. Portor marbel base standing on four gilt bronze engine-turned bun feet. The pendulum is hold above the escapement by two allegorical figures, featuring the Genius and the Experience. D. White enamel attributable to Dubuisson with Breguet numerals, the subsidiary seconds shown on a small silvered revolving chapter ring driven by the escapement. Blued steel Breguet hands. M. Brass rectangular with cylindrical pillars and two going barrel wound separately. Highly unusual form of pivoted detent ecapement with twin escape wheels each with four ratchet teeth, one for locking, the other for the impulse on the jewelled pallet of the pendulum. Half second beating gridion pandulum with knife edge suspension.Signed on the dial and back plate.Dim. 63 x 34 x 21 cm.

Breguet No. 153/2461, Garde Temps, constructed between 1808 and 1809, sold to Monsieur Barillon de l'Ile de France le 29 Novembre 1810 pour 1900 Francs. Returned by Doctor Portier on January 21, 1826, it was bought back by Breguet on February 14, 1826, for 900 Francs. Renovated to new condition, transferred to No. 4570 and sold to Son Excellence l'Ambassadeur de Russie, Comte Pozzo di Borgo on July 25, 1826 for 2400 Francs.Extremely fine gold pocket chronometer with power reserve indication, in a contemporary style red leather fitted box.

C. Three body garde-temps type, by Mermillod No. 596, renovated by Joly, engine-turned à grains d'orge. Gold cuvette secured by a screw. D. Engine-turned silver by Tavernier with Roman numerals on a plain reserve, subsidiary seconds on chapter "XII" and half-moon sector for the 30 hours power reserve Up-and-Down scale. Blued steel Breguet hands. M. Gilt brass, 23''', early garde-temps calibre, the inverted fusee with maintaining power, pivoted detent escapement, four-arm bimetallic compensationalance with pare-chute suspension on both pivots, free sprung blued steel helical balance spring with terminal curves.Diam. 62 mm.Accompanied by Breguet Certificate No. 2993, delivered on October 29, 1962.

Breguet & Fils, No. 2897, Horloge Marine, lettre K, sold to Ducom on October 17, 1816, for 1500 Francs.Rare and fine mahogany marine chronometer, similar to those produced in the workshop of Louis Berthoud.

C. Double body mahogany box with slide on the lid over the glazed observation aperture. Brass gimball with a ladded bowl lined with velvet. Brass case en forme de tabatière. D. White enamel by Lucard (signed on the enamel backing), regulator type, with small Roman chapter for hours, subsidiary seconds below, outer Arabic minute ring on the border of the bezel. Blued steel Breguet hands. M. Full plate with conical pillars secured by nuts with washers. Fusee with chain, and maintaining power, mainpring by Vincent dated August 1816, Louis Berthoud type pivoted detent escapement, four-arm compensation balance, with three wedged weights and timing screws, blued steel helical balance spring.Signed on the dial, the back plate and the dial rim.Dial diam. 80 mm.Dim. 13 x 14,5 x 15 cm.

Breguet No. 3230, Montre Garde Temps, constructed between 1818 and 1819, sold on July 13, 1827 to Capitaine Baudin, for 14000 Francs.Fine silver pocket chronometer, in a later red leather fitted box.

C. Three body, massive, "forme quatre baguettes" by Amy Gros, No. 666, polished. Hinged gilt brass cuvette. D. Silver engine-turned with Roman numerals on a polished chapter ring and subsidiary seconds on chapter "XII". Blued steel Breguet hands. M. 21''', gilt brass full plate with cylindrical pillars, fusee with chain and maintaining power, the back plate relieved for the barrel, spring detent escapement, two-arm compensation balance with wedged weights and timing screws of Earnshaw type, diamnd end-stone, free sprung blued steel helical balance spring with terminal curves.Signed on the dial, cuvette and movement.Accompanied by Breguet Certificate No. 2409, delivered on March 7, 1906.Diam. 59 mm.

Breguet & Fils, Horlogers de la Marine Royale,No. 4514, made between 1825 and 1827.Very fine and rare silver Garde-Temps with twin barrels, accompanied by the original ratchet key, suspended from a short silver chain. Gimballed in original mahogany box.

C. Double body mahogany box with slide on the lid over the observation aperture. Brass bowl and gimballed suspension. Three body silver, polished, made by Amy Gros No. 755. Silver detachable cuvette. D. Frosted silver, the small eccentric hour ring with Roman numerals, outer minute ring intersecting with subsidiary seconds circle. Blued steel "spade and lance" hands. M. 26''', gilt brass, bar calibre with individually wound twin barrels, spring detent escapement with gold escape wheel, two-arm bmetallic compensation balance with poising and timing screws, pare-chute suspension on the top pivot, blued steel helical balance spring with terminal curves.Signed on the cuvette.Accompanied by Breguet Certificate No. 3836.Diam. 66 mm.

Breguet No. 4851, sold to Mr. Delaporte on10 February 1831, for 800 Francs.Fine two day marine chronometer, of small size, with single barrel.

C. Two body solid mahogany box, with sliding observation lid (replaced), brass external handles and fittings, brass bowl with threaded bezel, suspended in square pattern gimbals with rounded corners.D. Matted silver, the small chapter-ring with Roman hour and Arabic numerals, and symmetrical subsidiary seconds below. Blued steel "pear" hands. M. Brass full plate, with single going barrel, navette shaped platform No. 220, with spring detent escapement, bimetallic two armed balance. Free sprung blued steel helical balance spring with terminal curves.Signed on the dial.Accompanied by Breguet Certificate No. 3508.Dial diam: 95 mm.

Breguet No. 4861, Horloge Marine à deux barillets, petit modèle, sold to Sa Majesté Louis Philippe on31 October 1839, for 2260 Francs.Rare and unusual Marine chronometer of Royal provenance with double gimbals.

C. Double body with visible mortise and tenon joints, a massive brass swan-neck handle with lion paw brackets on the top of the box. Double brass gimbals, the outer with conventional locking, the inner locking lever now lacking. D. Frosted and silvered with small eccentric Roman chapter for hours with outer Arabic minute ring, symmetrical subsidiary seconds below. Blued-steel "spade" hands. M. Brass half plate, spotted finished with two barrels separately wound, the springs signed by Vincent anddated 1829, navette-shaped detachable platform with spring detent escapement, bimetallic two-arm balance with poising and timing screws, free-sprung polished helical balance spring with adjustable stud.Signed and numbered on the dial.Accompanied by Breguet Certificate No. 4120.Dial diam. 90 mm.

Breguet Neveu & Cie. No. 4988, Montre Garde Temps, sold to Comte de Gourieff on June 17, 1841, for 1400 Francs.Fine silver pocket chronometer.

C. Three body, massive, "forme quatre baguettes" by Amy Joly, No. 1075, engine-turned. Detachable gilt brass cuvette. D. White enamel by Droz (signed on the enamel backing) with Roman numerals and subsidiary seconds on chapter "XII". Blued steel Breguet hands. M. 21''', gilt brass full plate with cylindrical pillars, fusee with chain and maintaining power, the back plate relieved for the barrel, spring detent escapement, two-arm compensation balance with poising weights and timing screws, diamonend-stone, free sprung blued steel helical balance spring with terminal curves.Signed on the dial, cuvette and movement.Diam. 59 mm.

Charles Oudin à Paris, circa 1830.Fine and very rare small marine chronometer with a highly unusual escapement.

C. Double body mahogany box with slide on the lid over the observation aperture. Brass gimbals with a lead-weighted bowl. D. Frosted silvered, regulator type with small eccentric Roman chapter for hours, symmetrical subsidiary seconds below and outer Arabic minute ring on the border of the bezel. Blued-steel Breguet hands. M. Frosted and gilt brass full plate with steel conical pillars secured by nuts with washers in the manner of Louis Berthoud, the fusee with maintaining power, resting-wheel vrge escapement with steel crown wheel and steel pallets on the balance staff, two-arm compensation balance with poising and timing screws, free-sprung blued-steel helical balance spring.Signed on the dial.Dial diam. 66 mm.

Frédéric Houriet, No. 79, Swiss, completed inMarch 1828.Very fine and rare silver pocket chronometer in original fitted box and accompanied by an extra crystal and a manuscript copy, made in Geneva on July 5, 1848, of the Description du Chronomètre No. 79, fait par F. Houriet du Locle - Mars 1828.

C. Three body, massive, "forme quatre baguettes", polished. Hinged gilt brass cuvette engraved with technical details. D. White enamel with Roman numerals, outer minute ring and sunk subsidiary seconds. Blued steel Breguet hands. M. 22''', frosted and gilt, three-quarter plate, with cylindrical pillars secured by screws, the back plate indented for the barrel secured by a bridge, the fusee with chain and maintaining power, 13 jewels, spring detent escapement, two-arm compensation balance with twwedged weights and timing screws, beating 21600 per hour, free sprung blued steel spherical balance spring.Numbered on the cuvette.Diam. 62 mm.

Le Paute & Fils, Horlogers du Roi, Invenit et Fecit, No. 17-7481, circa 1830.Very fine gilt brass month going, hour and half hour striking, centre second mantel regulator with remontoire, annual calendar and equation of time.

C. Rectangular glazed four faces and top, the face with foliate spandrels, engine-turned bezel, branches of laurel and ribbon knot below the dial, glass panel borders, cornice and moulded base with acanthus leaf decoration. D. White enamel with Roman numerals, outer minute ring and calendar aperture. Gilt brass "sun" hands for mean time, blued steel hands for equation and centre seconds. M. Brass rectangular with cylindrical pillars, going barrels on both the going and the striking trains, Lepaue pin-wheel escapement, the 5 second remontoire fitted on the back plate. Half-second beating gridiron pendulum with knife edge suspension. Striking on a bell with count wheel on the back plate. Equation work beneath the dial on the front plate. Winding holes concealed beneath the bezel.Signed on the dial and back plate.Dim. 47 x 28 18 cm.

Louis Berthoud, Paris, circa 1800.Very fine mahogany 15 going, centre seconds, long case regulator with unusual Fast/Slow precision adjustment

C. Rectangular with glazed door and side panels, ogee pediment with dentilled frieze. D. White enamel with Roman numerals and outer Arabic minutes and seconds rings. Gilt brass interlaced hands. M. Weight driven brass rectangular with cylindrical pillars, Graham escapement with micrometric adjustment fitted on the back plate, second beating gridiron pendulum with knife edge suspension and highly unusual subsidiary Fast-Slow precision adjustment.Signed on the dial.Dim. 195 x 53 x 28 cm.

Louis Berthoud, Horloger de la Marine, circa 1800.Very fine eight day going mahogany hour and half hour striking, centre seconds mantel regulator with special escapement.

C. Rectangular mahogany, glazed four sides with triangular pediment, flat columns on the face, surmounted by gilt bronze Egyptian figures. D. White enamel with Roman numerals and outer Arabic minutes and seconds rings. Blued steel Breguet hands. M. Brass circular with turned pillars secured by pins, going barrel on both the going and the striking trains, pin-wheel escapement à coups perdus, allowing to show the dead centre seconds with a half seconds beating pendulum. Half seconds gridiron penduum with knife edge suspension.Dim. 46 x 29 x 18 mm.

BERTHOUD (Louis).Entretiens sur l'horlogerie à l'usage de la Marine.

Paris, 1812.8 vo, 127 pp.Rebound in calf and marbled boards

No. 2577, construite par Louis Berthoud, Horloger de la Marine.Montre demi-marine, répétition ordinaire, échappement de Monsieur Raymond, Emboitagede Monsieur Béliard. Finie en blanc en Pluviôse et Ventôse an XIII (Février - Mars 1805). Le 15 Germinal an XIII (15 Avril 1805) fait marcher avant la dorure pour être emportée à Paris et dorée. Fait refaire l'échappement en Juin 1808. Sold on October 28, 1809 to Monsieur de Bougainville pour Monsieur son fils.Extremely fine and unique 18K gold quarter repeating pocket chronometer, gimballed in original mahogany box.

C. Three body massive "à double fond" made by Joly (Master mark), typical of Louis Berthoud's pocket "montres marines", polished with fixed cuvette and concealed hinges. D. White enamel by Lucard (signed on the enamel backing) with Breguet numerals and subsidiary seconds. Blued-steel Breguet hands.M. Frosted and gilt full plate with brass cylindrical pillars secured by pins, fusee with chain, maintaining power, typical Louis Berthoud type pivoted detent escapement with three-arm compensation balance and free sprung cylindrical balance spring.Signed on the dial, dial plate and back plate.Diam. 61 mm.

Louis Berthoud No. 2461-53, sold to M. le Général Cafarelli, Préfet Maritime de Brest, on 16 MessidorAn XI (5 July 1803), for 70 Louis.Early silver pocket chronometer in a three body mahogany deck watch box with brass fittings.

C. Three body massive "à double fond" made by Joly (Master mark), typical of Louis Berthoud's for pocket "montres marines", polished with fixed cuvette and concealed hinges. D. White enamel by Lucard (signed on the enamel backing) with Roman numerals and subsidiary seconds. Blued-steel Breguet hands.M. Frosted and gilt full plate with brass cylindrical pillars secured by pins, fusee with chain, maintaining power, typical Louis Berthoud type pivoted detent escapement with three-arm compensation balance and free sprung conical balance spring.Signed on the dial, dial plate and back plate.Diam. 68 mm.

Berthoud Frères, No. 215, circa 1818.Rare and important marine chronometer en forme de tabatière made in Louis Berthoud's workshop, after his death, under the direction of Henri Motel.

C. Double body mahogany box with slide on the lid over the glazed observation aperture. Brass gimball with a ladded bowl lined with velvet. Brass case en forme de tabatière. D. Silvered regulator type, with small Roman chapter for hours, subsidiary seconds below, outer Arabic minute ring on the border of the bezel. Blued steel Breguet hands. M. Frosted and gilt, full plate, fully jeweled, with conical pillars secured by nuts with washers. Fusee with chain, maintaining power, Louis Berthoud typeivoted detent escapement, three-arm compensation balance, with three wedged weights and timing screws, blued steel conical balance spring.Signed on the dial, the back plate and the dial rim.Dial diam. 80 mm.

Auguste Berthoud, No. 178, circa 1840.Fine and probably unique mahogany experimental marine chronometer en forme de tabatière.

C. Double body mahogany box with slide on the lid over the observation aperture. Brass gimball with a ladded bowl. Brass case en forme de tabatière, similar to that used by Louis Berthoud for his later chronometer. D. Silvered regulator type, similar to that used by Louis Berthoud, with small Roman chapter ring for hours, subsidiary seconds below, outer Arabic minute ring on the border of the bezel. Blued steel Breguet hands. M. Brass, full plate with steel conical pillars secured by nuts with wshers. Fusee with chain, maintaining power, spring detent escapement, three-arm compensation balance, with three wedged weights and timing screws, blued steel helical balance spring.Signed on the dial.Dial diam. 80 mm.Dim. 14 x 16 x 16 cm.

Lecocq, Elève du Gouvernement, Berthoud Professeur, circa 1840.Fine fine and one of the extremely rare examples of mahogany two day going marine chronometer, made under the control of Charles-Auguste Berthoud.

C. Double body solid mahogany, with sliding observation lid, brass bowl and circular gimballed suspension. D. Silvered regulator type, with small Roman chapter for hours, subsidiary seconds below, outer Arabic minute ring on the border of the bezel. Blued steel Breguet hands. M. Brass full plate with cylindrical pillars secured by pins, fusee with chain and maintaining power, spring detent escapement, three-arm compensation balance with trapezoidal poising weights and timing screws. Free sprunglued steel helical balance spring.Signed on the dial.Dial diam. 80 mm.Dim. 15,5 x 16,5 x 16,5 cm.

Dumas, Elève du Gouvernement, No. 21, circa 1840.Very fine and one of the extremely rare example of silver and gold pocket chronometer made under the control of Henri Motel with original ratchet key.

C. Four body, forme quatre baguettes, by Jules Perot (Master mark), with gold rims, engine turned back and ribbed band. Hinged silver cuvette. D. White enamel with Roman numerals and subsidiary seconds. Blued steel Breguet hands. M. 22''' gilt brass bar calibre with going barrel, Louis Berthoud type pivoted detent escapement, cut bimetallic two-arm compensation balance with poising and timing screws, free sprung blued steel helical balance spring with terminal curves.Signed on the cuvette.Diam. 58 mm.

Dumas, Elève du Gouvernement, No. 24, circa 1840.Very fine and one of the extremely rare examples of mahogany, marine chronometer made under the control of Henri Motel.

C. Double body mahogany box with slide on the lid over the observation aperture. Brass bowl and gimballed suspension, locking bolt on the edge.D. Silvered with Roman numerals and subsidiary seconds. Blued steel Breguet hands. M. Brass, "fausses côtes" finished, Motel calibre the fusee with maintaining power and the barrel secured by a single bridge, the escapement mounted on a separated plate, Louis Berthoud type pivoted detent escapement, four-arm compensation balance with four weights, poising and timing screws, blued steel conical balance spring.Signed on the dial and movement.Dial diam. 82 mm.Dim. 14 x 16 x 16 cm.

Dumas, No. 27, circa 1840.Very fine mahogany, 49 hour going marine chronometer with power reserve indicator. One of the earliest ever made by Dumas with his own calibre.

C. Three body mahogany with external brass handles, glazed upper section with hinged lid. Brass bowl and gimballed suspension. D. Silvered dial with Roman numerals, subsidiary seconds and Up-and-Down scale. Blued steel Breguet hands. M. Brass spotted finished full plate with conical pillars secured by screws, fusee with chain and maintaining power, Earnshaw type spring detent escapement, four-arm compensation balance with wedged weights and timing screws. Free sprung blued steel conical balancepring.Signed on the dial and back plate.Dial diam. 82 mm.Dim. 16 x 16 x 16,5 cm.

O. Dumas, Successeur de Gannery, No. 126, circa 1851.Very fine and rare magogany eight day going marine chronometer.

C. Three body mahogany with external brass handles, glazed upper section, the hinged lid with brass corners. Brass bowl and gimballed suspension.D. Frosted and silvered with Roman numerals, subsidiary seconds and Up-and-Down scale. Blued steel Breguet hands. M. Brass three-quarter plate with with main frame and sub-frame, conical pillars, fusee with chain and maintaining power, spring detent escapement, entirely fitted including the balance on a spotted finished platform, two-arm compensation balance with cylindrical weights and timing screws, free sprung blued steel helical balance spring with terminal curves.Signed on the dial and back plate.Dial diam. 110 mmDim. 18 x 17,5 x 17,5 cm.

Dumas, Successeur de Gannery, à St. Nicolas Près Dieppe, No. 442, circa 1860.Fine 49 hour going mahogany marine chronometer with power reserve indicator.

C. Three body mahogany box with external handles, glazed upper section the hinged lid with brass corners. Brass bowl and gimballed suspension.D. Silvered with Roman numerals, outer minute ring subsidiary seconds and Up-and-Down sector. Gilt brass Breguet hands. M. Brass full plate with cylindrical pillars secured by screws, fusee with maintaining power, Earnshaw type spring detent escapement, two-arm compensation balance with cylindrical weights and timing screws, free sprung blued steel helical balance spring.Signed on the dial and mahogany box.Dial diam. 80 mm.Dim. 16,5 x 16,5 x 17,5 cm.

(Henri Motel), Horloger de la Marine, No. 262, sold to Dépôt de la Marine on June 1, 1849, for 2400 Francs. The compensation balance with auxiliary compensation and blued steel helical balance spring with terminal curves by H. Charbonnier, from the Ecole Impériale d'Horlogerie de Cluse, completed on June 10, 1868.

C. Three body mahogany box with external handles, the glazed upper section with hinged lid. Brass bowl and gimballed suspension, locking bolt on the edge. D. Silvered with Roman numerals and subsidiary seconds. Blued steel Breguet hands. M. Brass, spotted finished, Motel calibre the fusee with maintaining power and the barrel secured by a single bridge, mainspring by Bourquin dated 1846, the escapement mounted on a separated plate, Louis Berthoud type pivoted escapement, two-arm compensation balnce with a variant of Pool auxiliary compensation, two cylindrical poising weights and timing screws, blued steel helical balance spring with terminal curves.Signed on the dial and movement.Dial diam. 82 mm.Dim. 17 x 16 x 15 cm.

Winnerl, France, No. 150, circa 1840.Very fine small, mahogany, 49 hour going marine chronometer with power reserve indicator

C. Double body solid mahogany, with sliding observation lid and external brass handles, brass bowl and circular gimballed suspension. D. Silvered with Roman numerals, subsidiary seconds and Up-and-Down scale. M. Spotted brass full plate with cylindrical pillars secured by screws, the back plate relieved for the barrel, fusee with chain and maintaining power, Earnshaw type spring detent escapement, two-arm balance with cylindrical weights and timing screws. Free sprung blued steel helical balancespring with terminal curves.Signed on the dial.Dial diam. 75 mm.Dim. 14,5 x 14,5 x 14 cm.

Winnerl, No. 433, circa 1845.Very fine and rare 18K gold, 32 hour going, early keyless pocket chronometer with power reserve indicator, in original fitted box.

C. Four body, massive, "forme quatre baguettes" by Jules Perot (Master mark), engine-turned, the back engraved with the monogram: "C.M.". Hinged gold cuvette. D. White enamel by Droz (signed on the enamel backing) with Roman numerals, subsidiary seconds and Up-and-Down sector. M. 18''', frosted and gilt three-quarter plate with cylindrical pillars, fusee with chain and maintaining power, spring detent escapement, two-arm compensation balance with gold wedged poising weights and timing screws, dimond end-stone, free sprung blued steel helical balance spring with terminal curves.Signed on the dial, cuvette and movement.Diam. 47 mm.

Delépine Jeune, (27, rue Coquillière), Paris, compteur pour observation made for the Exposition des produits de l'industrie française en 1844, the second of the instruments mentioned by the Jury Central for the attribution of the Silver Medal.Very fine and large silver watch with early split-centre seconds recorder.

C. Four body, massive, "forme quatre baguettes", by Jules Frédéric Favre (Master mark), engine-turned. Hinged silver cuvette. D. Frosted silver eccentric with Roman numerals, outer Arabic centre seconds ring on border of the bezel. Blued steel Breguet hands.M. 21''', gilt brass, bar calibre with going barrel,15 jewels, counterpoised lateral lever escapement, cut bimetallic balance, Breguet balance spring. Early split-seconds recorder operated by means of a single pull-twist piston through the pendant.Signed on the dial and cuvette.Diam. 55 mm.

Fecit Delépine, (27, rue Coquillière, Paris), No. 832, was awarded the Silver Medal at the Exposition des produits de l'industrie française en 1844.Very fine and large silver pocket chronometer.

C. Four body, massive, "forme quatre baguettes", by Léopold Secheret (Master mark), engine-turned. Hinged silver cuvette. D. Frosted silver with Roman numerals, outer minute ring and subsidiary seconds. Blued steel "spade" hands. M. Gilt brass half plate, fusee with chain and maintaining power, Louis Berthoud's type pivoted detent escapement, two-arm compensation balance with cylindrical poising weights and timing screws, free sprung blued steel helical balance spring with terminal curves, rubynd-stone.Signed on the dial, cuvette and back plate.Diam. 66 mm.

French, circa 1880.Very fine and rare 60 hour going mahogany marine chronometer with power reserve indicator and Winnerl continuous auxiliary compensation balance.

C. Three body mahogany box with internal handles, the glazed upper section with hinged lid. Brass bowl and gimballed suspension. D. Silvered spotted finished, with Roman numerals, outer minute ring subsidiary seconds and Up-and-Down scale. Gilt brass "pear" hands. M. Brass spotted finished, full plate with conical pillars secured by screws, inverted fusee with chain and maintaining power, Earnshaw type spring detent escapement, Winnerl continuous auxiliary compensation balance diamond end-stone,free sprung blued steel helical balance spring.Dial diam. 80 mm.Dim. 16,5 x 15 x 15 cm.

Jarossay & Compagnie à Paris, circa 1850.Very fine and rare, Brazilian rosewood centre-seconds wall regulator with worm-screw gearing, constructed after the patents No. 215 and 216 fromOctober 16, 1844.

C. Rectangular, moulded with four fluted and twisted columns, shaped pediment, glazed door and side panels. D. White enamel small eccentric hour and minute chapter ring with Roman numerals, outer Arabic second ring on the bezel's border. Blued steel Breguet hands. M. Brass, with separate twin going barrels wound separately, but geared to drive around a fixed pinion and providing power by means of a large pulley with an endless rope transmitting the drive to the worm-screw gear train, pin-wheel ecapement, with seconds-beating Steel-rod pendulum, with spring suspension. Highly unusual temperature compensation provided by a long steel rod with micrometric adjustment at the lower end and lifting the pendulum suspension by means of a lever.Signed on the dial and on the bridge linking the barrels.Accompanied by copies of the original patent.Dim. 143 x 36 x 19 cm.

Vissière, 56 rue de l'Ouest, Paris, No. 243, sold to the Dépôt de la Marine, circa 1860.Fine small mahogany, 49 hour going, marine chronometer with regulator dial and power reserve indicator.

C. Three body mahogany box with external brass handles, glazed upper section with hinged lid. Brass bowl and gimballed suspension mounted on shock absorber. D. Silvered with subsidiary small Roman hour chapter ring, symmetrical Arabic seconds ring and Up-and-Down sector below, outer Arabic minutes ring on the border. Blued-steel Breguet hands.M. Brass full plate with cylindrical pillars secured by screws, fusee with maintaining power, Earnshaw type spring detent escapement two-arm bimetallic compensation balance with cylindrical weights and timing screws. Free sprung polished-steel helical balance spring with terminal curves and diamond end-stone.Signed on the box, dial and movement.Dial diam. 80 mm.Dim. 16 x 16 x 17 cm.

M. Viel-Robin, Paris, No. 151, circa 1870.Fine and unusual mahogany, four day going chronometer with power reserve indicator.

C. Double body box. Brass bowl and gimbal suspension. D. Silvered with Roman numerals, subsidiary seconds and Up-and-Down scale. Polished steel Breguet hands. M. Brass three-quarter plate with cylindrical pillars, fusee with chain and maintaining power, Henri Robert type pivoted detent escapement set in a smaller circular cage, two-arm compensation balance with wedged weights and timing screws, free sprung blued steel helical balance spring.Signed on the dial. Dial diam. 115 mm.Dim. 18,5 x 19,5 x 19,5 cm.

E. Delépine à St. Nicolas, près Dieppe, France,No. 1764, made in 1896.Fine 49 hour going mahogany marine chronometer with power reserve indicator.

C. Three body mahogany box with external handles, the glazed upper section with hinged lid. Brass bowl and gimballed suspension. D. Silvered with Roman numerals, outer minute ring subsidiary seconds and Up-and-Down sector. Gilt brass "pear" hands. M. Brass spotted finished, full plate with cylindrical pillars secured by screws, inverted fusee with maintaining power, Earnshaw type spring detent escapement, two-arm compensation balance with cylindrical weights and timing screws, diamond end-stone,free sprung palladium helical balance spring.Signed on the dial, back plate and mahogany box.Dial diam. 92 mm.Dim. 16,5 x 16,5 x 17,5 cm.

Barraud, Maker to the Royal Navy, 41 Cornhill, London, No. 2736, circa 1850.Very fine, small, rosewood, 56 hour going marine chronometer with power reserve indicator and Lund's middle temperature error compensation.

C. Three body rosewood box, with brass stringing and sunk brass handles, all the edges and corners protected by heavy brass inlay, the glazed upper section with hinged lid. Brass bowl and gimballed suspension. D. Silvered with Roman numerals, subsidiary seconds and Up-and-Down scale, applied with gilt bronze Royal shields. Gold "spade" hands.M. Brass full plate with cylindrical pillars secured by screws, the back plate relieved for the barrel, fusee with chain and maintaining power, Earnshaw type spring detent escapement, two-arm balance with a wedge weight, timing screws and one of Lund's patent correcting weight, giving continuous auxiliary compensation. Free sprung blued steel helical balance spring with terminal curves; diamond end-stone.Dial diam. 100 mm.Dim. 18 x 17 x 17 cm.

Dent, Chronometer Maker to the Queen, London, No. 2836, circa 1858.Very fine 56 hour marine chronometer with power reserve indication and Dent's prismatic continuous auxiliary compensation balance, second form.

C. Three body mahogany box with brass corners, fixings and sunk brass handles, glazed upper section with hinged lid. Brass bowl and gimballed suspension. D. Silvered with Roman numerals, subsidiary seconds and Up-and-Down scale. Blued steel "pear" hands.M. Spotted brass full plate, relieved for the barrel, cylindrical pillars secured by screws, fusee with chain and maintaining power, Earnshaw type spring detent escapement, Frederick Rippon Dent's prismatic balance continuous auxiliary compensation type "B", diamond end-stone, free sprung blued steel helical balance spring with terminal curves.Signed on the dial.Dial diam. 102 mm.Dim. 19 x 18 x18 cm.

Dent, Chronometer Maker to the Queen, 33, Cockspur St. London, No. 29735, made circa 1885.Very fine and rare, Coromandel wood eight day going marine chronometer with power reserve indication and Dent's single staple auxiliary compensation balance.

C. Three body Coromandel wood box with sunk brass handles, glazed upper section with hinged lid. Brass bowl and gimballed suspension. D. Silvered with Roman numerals, subsidiary seconds and Up-and-Down scale. Gold "pear" hands. M. Of the best possible quality, spotted brass with main frame and sub-frame, cylindrical pillars, fusee with chain and maintaining power, Earnshaw type spring detent escapement, Dent's single staple auxiliary compensation balance with cylindrical weights, diamond end-stoe, free sprung polished steel helical balance spring with terminal curves.Signed on the dial.Dial diam. 125 mm.Dim. 23 x 20 x 20 cm.

Charles Frodsham, 84 Strand, London, circa 1880.Fine and rare gilt brass eight day going, giant timepiece carriage clock with chronometer escapement, power reserve indication and middle temperature error compensation.

C. Gilt bronze "Anglaise" glazed four sides and top.D. Satiné silvered with Roman numerals, subsidiary seconds and Up-and-Down scale. Blued steel "pear" hands. M. Brass, frosted and gilt rectangular with cylindrical pillars, fusee with chain and maintaining power, spotted gilt brass, Earnshaw type spring detent platform escapement, two-arm compensation balance with cylindrical poising weights, timing screws and Pool's middle temperature error compensation, helical blued steel balance spring, diamond endstone.Signed on dial and movement.Dim. 24,5 x 18 x 16,5 cm.

Charles Frodsham & Co., 84, Strand, London, AD.FMSZ No. 7326, with London hallmarks for 1887.Very fine and unusual silver deck-watch, with 54 hour power reserve indication and free sprung special balance spring in original fitted mahogany deck watch box.

C. Three body, massive, "bassine et filets", polished, marked "G. J. T." (George James Thickbroom). Hinged silver cuvette. D. Silvered with Roman numerals, outer minute ring, subsidiary seconds and Up-and-Down scale. Blued steel "pear" hands. M. 26''' frosted and gilt brass three-quarter plate with turned pillars, 13 jewels in screwed settings, fusee with chain and maintaining power, Earnshaw type spring detent escapement, cut bimetallic balance with gold timing screws, free sprung blued steel do-in-uno balance spring and diamond endstone.Signed on the dial and back plate.Diam. 69 mm.Box dim. 140 x 110 x 59 mm.

Patek Philippe & Cie., Genève, No. 41372, made for A. Barbero & Co., Roma, sold to General Zinoviefon September 27, 1873.Fine and rare 18K gold, hunting cased, keyless pocket chronometer, with Bulletin for the timing contest organised at the Observatory of Geneva on March 3, 1873.

C. Four body, massive, "bassine et filets", polished. Hinged gold cuvette. D. White enamel with Roman numerals and sunk subsidiary seconds. Blued steel "spade" hands. M. 21''', gilt brass, 15 jewels, gold wheel train, spring detent escapement, cut bimetallic balance, free sprung blued steel spherical balance spring.Signed on the cuvette both by Patek Philippe and the retailer.Diam. 55 mm.Accompanied by Extracts from the Archives.

Unsigned, Swiss, the tourbillon by Ernest Guinand, Locle, made for the Spanish Market, circa 1880.Fine and early 18K pink gold hunting-cased, pocket chronometer, with one minute tourbillon regulator.

C. Five body massive, "Bassine et filets", polished, made by R. Waldvogel. Hinged gold cuvette. D. Gold engine turned with cast varicoloured gold foliage decoration, Roman numerals and subsidiary seconds. Blued steel "fleurs de lys" hands. M. 19''' nickel plated, Geneva "fausses côtes" decoration, caliber in the form of conjoined initials, 12 jewels on the carriage, pivoted detent escapement with gold escape wheel, cut bimetallic balance, Breguet balance spring with index regulator. Ernest Guinad's three-arm polished steel carriage of the second type, driven by the third wheel.Diam. 53 mm.

Ulysse Nardin, Locle, Suisse, No. 8/5900, made in 1879.Very fine and rare, early, rosewood, 56 hour going marine chronometer with power reserve indicator and electrical contacts.

C. Three body rosewood box, with brass stringing and sunk brass handles, all the edges and corners protected by heavy brass inlay, the glazed upper section with hinged lid. Brass bowl and gimballed suspension. D. Silvered with Roman numerals, subsidiary seconds and Up-and-Down scale. Gold "spade" hands. M. Brass full plate with cylindrical pillars secured by screws, the back plate relieved for the barrel, fusee with chain and maintaining power, spring detent escapement visible through an aperturon the back plate, two-arm balance with cylindrical weights and timing screws, free sprung blued steel helical balance spring with terminal curves.Accompagnied by the Bulletin de Première Classe of the Observatory of Neuchâtel.Dial diam. 100 mm.Dim. 19 x 17,5 x 17,5 cm.

Ulysse Nardin, Locle, Swiss, Chronomètre,No. 20872, circa 1920.Fine silver, keyless pocket lever chronometer with40 hour power reserve indicator.

C. Four body, massive, "bassine", polished. Hinged silver cuvette. D. White enamel with Arabic numerals, sunk subsidiary seconds and Up-and-Down scale. Blued steel "spade" hands. M. 18''', rhodium plated, "fausses côtes" decoration, 18 jewels, straight line lever escapement, brass-invar Guillaume balance, blued steel balance spring with terminal curve and swan neck micrometric index.Signed on the dial, case and movement.Diam. 52 mm.

Ulysse Nardin, Locle, Swiss, Chronomètre,No. 120904, sold by Andreas Huber, Munchen-Berlin, to the German Navy, Service Number M. 5855,circa 1943.Fine silver, keyless pocket lever chronometer.

C. Four body, massive, "bassine et filets", polished, the back engraved with the Service Number. Hinged silver cuvette. D. White enamel with Roman numerals and sunk subsidiary seconds. Blued steel "spade" hands. M. 22''', frosted and gilt, 21 jewels, straight line lever escapement, brass-invar Guillaume balance, eight adjustments, blued steel balance spring with terminal curve and micrometric index.Signed on the dial, case and movement.Signed by the retailer on the cuvette.Diam. 59 mm.

Ulysse Nardin, Locle, Suisse, Sidereal Time, Chronometer, No. 122398, circa 1945.Fine stainless steel keyless deck lever chronometer with power reserve indication and dead seconds' electrical contacts.

C. Four body, massive, "bassine et filets", polished, the screwed back with milled border. Stainless steel clipped cuvette. D. White enamel with Roman numerals, sunk subsidiary seconds and Up-and-Down scale. Blued steel "spade" hands. M. 22''', frosted and gilt, 23 jewels, straight line lever escapement, brass-invar Guillaume balance, eight adjustments, blued steel balance spring with terminal curve and special micrometric index.Signed on the dial, case and movement.Diam. 64 mm.

Ulysse Nardin, Locle, Swiss, No. 29061,case No. 399993, entered in the registers in July 1939.Very fine and important 18K gold, keyless pocket chronometer with one minute tourbillon regulator.

C. Four body, "bassine", polished. Hinged gold cuvette. D. White enamel with Roman numerals and sunk subsidiary seconds. Blued steel Breguet hands. M. 19''', rhodium plated, "fausses côtes" decoration, Pellaton calibre, 19 jewels, lateral lever escapement, cut bimetallic balance, blued steel balance spring with terminal curve. One minute tourbillon regulator, the polished steel Pellaton type carriage with three equidistant arms, made by J. Golay.Signed on the dial, case and movement.Diam. 53 mm.

Paul Ditisheim, La Chaux-de-Fonds, (Swiss),No. 18276, Grand Prix Exposition Universelle,Paris 1900 - Premier aux Concours Chronométriquesdes Observatoires de Kew, Washington & Neuchâtel,circa 1910.Fine silver keyless lever chronometer in original mahogany fitted box.

C. Three body, massive, with brass fixings and corners. Silver four body, massive, "bassine et filets", polished. Hinged silver cuvette. D. Frosted silver with Roman numerals and subsidiary seconds. Blued steel "spade" hands. M. 22''', gilt brass, 20 jewels, straight line lever escapement, brass-invar Guillaume balance, Breguet balance spring.Signed on the dial and movement.Diam. 60 mm.

Paul Ditisheim, Sovil, No. 734352, Swiss, circa 1920.Fine 18K gold, keyless watch with special compensated balance.

C. Four body, "demi-bassine", polished. Hinged gold cuvette engraved with the awarded prizes at the Exhibitions of Paris in 1900 and Berne in 1914.D. White enamel with bolt Breguet numerals and sunk subsidiary seconds. Blued steel "modern" hands. M. 18''', rhodium plated, 18 jewels, straight line lever escapement, Affix balance, Swiss patent No. 91169, Breguet balance spring with rack and pinion micrometric index.Signed on the dial, case and movement.Accompanied by photocopies of the Ditisheim patents No. 91169 and 98234, concerning the invention of the Affix balance.Diam. 49 mm.

Breguet No. 4107, produced in September 1938, sold to the French Aéronautique on December 30, 1938, for 15800 Francs.Fine keyless Sidéromètre Breguet Type 101 split seconds chronograph, Breveté S.G.D.G., from a small series of 25 pieces only.

C. Painted aluminium box, lined with felt insulation. Three fixing brackets are riveted to the outside. There is no case, the movement being fixed to the underside of the dial-plate, the latter engraved with operating indication. D. White enamel with outer seconds ring and three apertures for the digital degree indications. Blued steel counterpoised hand. M. 24''', high quality, blank by V. Piguet, 21 jewels, two with differential winding, one for the going train, the other for the motion work sthat the going train can advance the numbered discs with minimal resistance. The motion work is very complex and carefully made. Straight line lever escapement, brass-invar "Intégral" Guillaume balance, blued steel balance spring with terminal curve.Signed on the dial, the front plate and on the reverse of the bezel.Dim. 100 x 143 x 118 mm

L. Leroy & Cie., 7 Bd. de La Madeleine, Paris,No. 1403, Pendule à pression constante commissioned on January 27th 1930, delivered on December 2, the same year.Very fine and rare, centre seconds, Constant Pressure observatory precision regulator.

C. White painted bronze cylinder with cast-iron white painted wall bracket, glass dome over the brass bracket supporting the movement. D. Silvered with Arabic seconds ring and observation apertures over the remontoire and the escape wheel. Blued steel counterpoised hand. M. Brass trapezoidal full plate, marble finished, with cylindrical pillars, running in partial vacuum. Reid type escapement specially adapted by Leroy, the power supplied by the fall of a weighted arm, raised every 32 seconds byan electro-magnet. The invar pendulum beats 61 times in 60 seconds. A double contact is activated directly by the pendulum, and both circuits are closed momentarily with each oscillation, except on the 61st swing when they are by-passed by the action of a third breaker in order to mark the minute. By adjusting the internal pressure of the case, the rate can be adjusted, starting at 0 atmospheres. An increase of pressure of 1 mm of mercury, slows the rate by 0,018 of a second. The rateis adjusted so that the signals coincide with the hour precisely, once the small daily variations have been eliminated.Dim. 146 x 38 cm.

L. Leroy & Cie., Paris, Chronostat No. 1, circa 1955.Very fine mahogany prototype of the Chronostat.

C. Three body deck-watch type mahogany box. Cylindrical brass bowl with screwed bezel. D. Silvered with Arabic numerals and subsidiary seconds. Blued steel "spade" hands. M. Brass, marble finished, electrically powered, Sully type "shaft cutting" frictional rest escapement with vertical escape wheel and double pallet on the balance staff, "Integral" Guillaume balance, free sprung blued steel helical balance spring with terminal curves.Signed on the dial.Dial diam. 70 mm.

L. Leroy & Cie., Paris, Chronostat No. 2, circa 1955.Very fine mahogany prototype of the Chronostat.

C. Double body mahogany box. Cylindrical nickel bowl with screwed bezel. D. Silvered with Arabic numerals and subsidiary seconds. Blued steel "spade" hands. M. Electrically powered, spring detent escapement, "Integral" Guillaume balance, free sprung blued steel helical balance spring with terminal curves.Signed on the dial and movement.Dial diam. 70 mm.

L. Leroy & Cie., Paris, No. 1898, ATO Patent, sold to the French Navy following the contest organised at the Observatory from February 2, 1969, to April 14, 1969, accompanied by the original rating book attestingit was delivered to the submarine Psyché onAugust 12, 1969.Fine mahogany Chronostat III, in original fitted travelling box.

C. Double body mahogany, rectangular with glazed lid. D. Silvered with Arabic numerals and subsidiary seconds. Blued steel "dauphines" hands. M. Transistor controlled electrically impulse, chronometer pattern Guillaume balance, free sprung blued steel helical balance spring.Signed on the dial and the movement.Dim. 17 x 13 x 9 cm.

L. Leroy & Cie., Horlogers de la Marine, 4, Faubourg Saint Honoré, Paris, No. 1846, Brillé Patent, sold in 1959 for 1500 Francs, to the Service Hydrographique de la Marine.Fine Base de temps électromagnétique type "Chronostat II", in original fitted box.

C. Square glazed amagnetic painted metal case.M. Transistor controlled electrically impulsed, chronometer pattern Guillaume balance, free sprung blued steel helical balance spring.Signed on the movement.Dim. 68 x 68 x 40 mm.

L. Leroy & Cie., Horlogers de la Marine,7 Boulevard de la Madeleine, Paris, No. 2931, sold to Marquise de Flers in 1914.Fine 18K gold keyless pocket lever chronometer. Bulletin de Première classe de l'Observatoire National de Besançon No. 9234, in 1913, was awarded the Gold Medal with a total of 236 marks, in original fitted leather box.

C. Three body, massive, "bassine", polished. Hinged gold cuvette engraved with the awarded prize. D. Two tone white enamel, with Roman numerals, outer minute ring and sunk subsidiary seconds. Blued steel "spade" hands. M. 19''', gilt brass with punch-mark in form of a viper's head set by the Observatory of Besançon, 20 jewels, straight line lever escapement, brass-invar Guillaume balance adjusted by Grogg, blued steel balance spring with terminal curve.Signed on the dial, case and movement.Accompanied by copies of the timing certificates and by a letter from Maison Leroy.Diam. 53 mm.

J. Auricoste, Horloger de la Marine, 10, rue la Boetie à Paris, circa 1910.Fine and unusual small sidereal counter.

C. Three body mahogany deck-watch type box. Brass bowl with screwed bezel. D. White enamel, outer Arabic sidereal seconds ring and subsidiary small60 sidereal minute register. Blued steel hands.M. 20''', brass, three quarter plate, 15 jewels, with cylindrical pillars, going barrel, pivoted detent escapement, cut bimetallic balance, blued steel balance spring with terminal curve.Signed on the wooden box.Dial diam. 50 mm.

Elgin National Watch Co., No. 15394104, made for the U.S. Navy, Service Number 4104, circa 1940.Fine silver keyless pocket lever chronometer, with40 hour power reserve indication, in original fitted double body mahogany deck box.

C. Four body, massive, "bassine", polished, the back engraved with the Service Number. Hinged silver cuvette. D. Silvered with Arabic numerals, outer minute ring, sunk subsidiary seconds and Up-and-Down scale. Blued steel "spade" hands. M. 19''', rhodium plated "fausses côtes" decoration in a sunburst pattern, 21 jewels, straight line lever escapement, brass-invar Guillaume balance adjusted in 5 positions, Breguet balance spring.Signed on the dial and movement.Diam. 63 mm.

A. Lange & Söhne, Glashütte, i. Sa., No. 201 378,circa 1940.Fine silver keyless pocket lever chronometer with32 hour power reserve indication, made for the German Navy, Service Number M. 6884.

C. Four body, massive, "bassine", polished, the back engraved with the Service Number. Hinged silver cuvette. D. Silvered two tone with Arabic numerals, subsidiary seconds and Up-and-Down scale. Blued steel "spade" hands. M. 22''', frosted and gilt, three quarter plate, calibre 48, 17 jewels, straight line lever escapement, brass-invar Guillaume balance, Breguet balance spring.Signed on the case and movement.Diam. 59 mm.

George Daniels, London, No. SB, specially made for Mr. Sam Bloomfield in 1969.Very elegant and unique 18K gold pocket chronometer with twin barrel, chronometer escapement, one minute tourbillon regulator and retrograde jumping hours. In original red Morocco fitted box with gold male key, short tapered link gold chain and certificate.

C. Double body with engine-turned back, marked"G. D." (George Daniels) with London hallmarks for 1969 and articulated crescent pendant drawn from that of Sylvain Mairet. D. Silver engine turned with eccentric minute ring, retrograde hour sector, and subsidiary seconds. Blued steel hands. M. Glazed, 25''', frosted and gilt, with tween barrels, spring detent escapement, four-arm mono-metallic balance with adjusting screw at each ends, based on the same principle as the giromax used by Patek Philippe, free sprung self compensating balance sping with terminal curve. Two-arm polished steel carriage with narrow straight lined bridge in the style of Nicole Nielsen first type.Signed on the dial and movement.Diam. 62 mm.

Omega, Swiss, De Ville Co-Axial, completed in 1999. Prototype No. 01 of three limited series of delux timepieces: A series of 1000 watches in yellow gold with silver dial.-A series of 1000 watches in red gold with midnight blue dial.-A series of 100 watches in platinum with copper coloured dial.Very fine and unique 18K pink gold Amagnetic, centre seconds, self-winding wristwatch with date, Omega Calibre 2500 with George Daniels Coaxial Escapement and Regulating System.Chronometer certification by the C.O.S.C. (Contrôle Officiel de Chronométrie Suisse)

C. Massive, polished with screwed back and protected winding crown. Antimagnetic dust cap. Scratch-resistant sapphire crystal with anti-reflective treatment inside. D. Black, 12 facets applied with heavily profiled polished gold Roman numerals and indexes, outer minute and seconds ring, date aperture onchapter III. Skeleton luminescent, faceted leaf-shaped, diamond-polished hands. M. 11''', rhodium plated, "fausses côtes" decoration, 27 jewels, the steel rotor type winding weight pivoted to the centre. Daniels Coaxial escapement, four-arm Omega monometallic balance with two regulating micro screws on the rim, adjusted to five positions and temperatures, the balance pivots, both with Incabloc suspensions, free sprung Invar balance spring.Signed on the dial, case and movement.Accompanied by alligator leather strap and 18K pink gold Omega deployant clasp, in a luxurious pigskin box designed as a book with ribbed back.Diam.38 mm.

F. P. Journe Invenit et Fecit, Resonance System Chronometer, Prototype No. 000, completed in September 1999 for the Antiquorum Theme Auction: The Longitude at the Eve of the Third Millennium.Fine platinum, two time zone, world first wristwatch with resonance controlled twin independent movements and 40 hour power reserve indication.

C. Massive, polished, the back with sapphire crystal, top and side winding crowns engine-turned in a silk-like pattern. D. Twin silver engine-turned with concentric radial Arabic hour and minute rings, offset subsidiary seconds. Frosted gold dial plate with engraved Up-and-Down scale. Blued steel "Journe" hands. M. 13''' rhodium plated, "fausses côtes" decoration, twin independent complete trains set on a single plate, 37 jewels, straight line levers escapements, berylium four-arm balances withour adjustable timing weights, free sprung Invar balance spring, the balance pivots, both with incabloc suspensions. One of the escapements is mounted on a small platform pivoting around the second wheel by means of rack and pinion to adjust the distance between the two balances in order to find the most efficient position for resonance synchronisation.Signed on the dial and movement.Diam. 38 mm.

Breguet, Ref. 3800, Aéronavale Type XX, 1990's.Fine, self-winding, water-resistant down to 100 m., stainless steel military-type wristwatch with retouren vol round button chronograph and registers, stainless steel integrated bracelet.

C. three body, polished, revolving graduated bezel, reeded band, screwed case back. D. black with tritium-coated Arabic numerals, auxiliary dials for the seconds, the 12 hours and 30 minutes registers. "Bâton" tritium-coated hands. M. mechanical with automatic winding, 25 jewels, shock-absorber.Dial, case and movement signed.Diam. 39 mm.

Gérald Genta, Double Rétro Classic, Ref. G 3734,circa 1998.Very fine and rare, jumping-hour, self-winding, water-resistant, 18K pink gold gentleman's wristwatch with retrograde minutes and date, with leather strap and 18K pink gold Gérald Genta buckle.

C. three body, massive, polished, back with screws, reeded band, rounded bezel, straight lugs, screwed bars. D. "guilloché" mother-of-pearl with painted Arabic numerals, at the top, sector for the retrograde minutes, at the bottom, other sector of 150 degrees for the date, on the 12, aperture for the hours. "Epée" blued steel hands. M. mechanical with automatic winding.Dial, case and movement signed.Diam. 36 mm.

Girard-Perregaux, Chronographe Rattrapante Tribute to Ferrari, No. 206, Ref. 9015, made in 1994.Very fine and rare, self-winding, water-resistant to3 atm., 18K yellow gold gentleman's wristwatch with round button split second chronograph and registers, three crowns, 40 hours autonomy, leather strap and 18K yellow gold Ferrari buckle.

C. three body, massive, polished, screwed dedicated case back, on the winding-crown, the logo "Ferrari". D. matt silver with applied gold indexes, auxiliary dials for the seconds, the 12 hours and 30 minutes registers, under the 12 the logo "Ferrari". "Dauphine" yellow gold hands. M. Cal. 8290, mechanical with automatic winding, 27 jewels.Dial, case and movement signed.Diam. 38 mm.

Corum, Tabogan, 1990's.Fine and unusual, water-resistant, asymmetric, rectangular curved, 18K pink gold gentleman's wristwatch bearing a sliding and hinged mechanism which transforms the watch into a bed-side clock, with leather strap and 18K pink gold Corum buckle.

C. four body, massive, polished, asymmetric, wide outer bezel and case back with screws both with hinges, the opening mechanism of the case operated by two pushers at the bottom, inner case back bearing the engraving of the GMT time-zones of 14 towns in the world, according to GMT noon in London, curved sapphire crystal, hooded winding-crown. D. in meteorite "Agpalilik", embossed with stilized Roman numerals and tritium-coated indexes. "Bâton" tritium-coated gold hands. M. mechanical with manualwinding.Signed on the dial, numbered on the case.Dim. 24 x 40 mm.

Officine Panerai Firenze 1860, Radiomir, No 8/60, made on 18 December, 1997, sold on 4 March, 1998.Large and extremely rare, cushion shaped, waterproof to 30 meters, platinum military-type diving wristwatch with 41 hours power-reserve, 18K white gold buckle. Accompanied by a large thuya-root wooden fitted box, a maquette of the Mignatta explosive mobile torpedo, the book I Mezzi d'Assalto della Xa Flottiglia Mas di Marco Spertini e Erminio Bagnasco and a certificate.

C. three body, massive (weighing 124 gr. without the movement), polished, screwed mineral sapphire crystal back (with an additional platinum back), screwed crown, wire lugs. D. black with tritium-coated Arabic numerals and indexes. "Bâton" tritium-coated hands. M. 16''' signed Rolex and dating of the 1940's original movement, rhodium plated, "fausses côtes" decoration, 17 jewels, lever escapement, monometallic balance with 18'000 oscillations per hour, shock-absorber, self-compensating flat balace-spring.Dial, case and movement signed.Dim. 46 x 50 mm.

Omega, Speedmaster Professional, No 31/50, Ref. 3691, made in 1992.Very fine and very rare, self-winding, water-resistant to 3 atm., 18K yellow gold skeletonized gentleman's wristwatch with round button chronograph, registers and tachometer, with leather strap and 18K yellow gold deployant clasp.

C. skeletonized, three body, massive, polished and brushed, screwed transparent case back, tachometer graduation on the black bezel, lapidated lugs.D. transparent with applied gold indexes, outer ring for the minutes, auxiliary black ring dials for the seconds, the 12 hours and 30 minutes registers. "Bâton" gold and black hands. M. Cal. 867, skeleton, mechanical with manual winding.Signed on the case.Diam. 42 mm.

Auguste Berthoud, No. 171, circa 1860, Modifié et réglé par Vissière, circa 1880.Fine small, rosewood, 42 hour going marine chronometer with power reserve indicator

C. Three body rosewood box with brass corners fixings and sunk brass handles, the glazed upper section with hinged lid and brass corners. Brass bowl and gimballed suspension. D. Silvered with Roman numerals, subsidiary seconds and Up-and-Down scale. Blued steel Breguet hands. M. Spotted brass full plate with cylindrical pillars secured by screws, the back plate relieved for the barrel, fusee with chain and maintaining power, Earnshaw type spring detent escapement, two-arm balance with cylindricaweights and timing screws. Free sprung blued steel helical balance spring with terminal curves.Dial diam. 75 mm.Dim. 16,5 x 16,5 x 16,5 cm.

Breguet No. 886, sold to the Dépôt de la Marine in 1863, for 2000 Francs.Fine mahogany marine chronometer with 49 hour power reserve indicator.

C. Three body mahogany box with external handles, the glazed upper section with hinged lid and brass corners. Brass bowl and gimballed suspension.D. Silvered with Roman numerals, outer minutes ring, subsidiary seconds and Up-and-Down sector. Blued-steel "pear" hands. M. Frosted and gilt, full plate with cylindrical pillars secured by screws, Pons calibre, inverted fusee with maintaining power, Earnshaw type spring detent escapement, two-arm bimetallic compensation balance with cylindrical weights and timing screws, diamond end-stone, free sprung polished-steel helical balance spring with terminal curves.Signed on the dial and mahogany box.Dial diam. 81 mm.Dim. 16 x 16 x 17 cm.

Arnold & Dent, 84 Strand, London, No. 1394,circa 1840.Fine 48 hour going mahogany marine chronometer with power reserve indicator.

C. Three body mahogany box with external handles, the glazed upper section with hinged lid. Brass bowl and gimballed suspension. D. Silvered with Roman numerals, outer minute ring subsidiary seconds and Up-and-Down sector. Blued steel "Pear" hands.M. Brass spotted finished, full plate with cylindrical pillars secured by screws, fusee with maintaining power, Earnshaw type spring detent escapement, two-arm bimetallic compensation balance with cylindrical weights and timing screws, diamond end-stone, free sprung helical balance spring.Signed on the dial and mahogany box.Dial diam. 95 mmDim. 15.2 x 15. 2 x 16.5 cm

Margetts, London, two day timekeeper, James Hatton, London, No. 245, circa 1812.Fine and very rare, small two day going marine chronometer.

C. Three body mahogany box with external brass handles, glazed upper section with hinged lid. Brass bowl and gimballed suspension. D. Silvered with Roman numerals and subsidiary seconds. Gold "pear" hands. M. 21''', gilt brass full plate with cylindrical pillars, fusee with chain and maintaining power, the back plate relieved for the barrel maintained by a bridge, Earnshaw type spring detent escapement, two-arm compensation balance with poising weights and timing screws, ruby end-stone, free sprng blued steel helical balance spring.Margetts signature on the back plate.Signed and numbered by Hatton on the dial.Dial diam. 57 mm.Box dim. 135 x 125 x 130 mm.

Haas & Privat, La Chaux-de-Fonds, Swiss, No. 42681, circa 1890.Fine small mahogany lever chronometer.

C. Three body, mahogany, a magnifying glass on the observation aperture, brass bowl and circular gimballed suspension. D. Silvered with Roman numerals and sunk subsidiary seconds. Blued steel Breguet hands. M. Glazed, 24''', frosted and gilt, three-quarter plate with going barrel, 15 jewels, straight line lever escapement, cut bimetallic balance, free sprung blued steel helical balance spring.Signed on the back plate.Dial diam. 60 mm.Dim. 12,5 x 12,5 x 12,5 mm.

Berthoud Frères, No. 172, made circa 1822, sold to Monsieur Delaval à Marseille, rue de Paradis No. 53, for 1800 Francs.Rare marine deck watch, made in Louis Berthoud's workshop, after his death, under the direction of Henri Motel.

C. Triple body mahogany deck watch type box. Brass case en forme de tabatière secured inside the mahogany box. D. Silvered regulator type, with small Roman chapter for hours, subsidiary seconds below, outer Arabic minute ring on the border of the bezel. Blued steel Breguet hands. M. Frosted and gilt, full plate, fully jeweled, with conical pillars secured by nuts with washers, mainspring by Vincent, dated. Fusee with chain, maintaining power, pivoted detent escapement, three-arm compensation balnce, with three wedged weights and timing screws, free sprung blued steel helical balance spring.Signed on the dial and back plate.Dial diam. 80 mm.

Winnerl, France, No. 356, circa 1849.Fine small mahogany, 49 hour going, marine chronometer.

C. Three body mahogany deck watch type box, the brass bowl with screwed bezel. D. Silvered with Roman numerals, subsidiary seconds and Up-and-Down scale. Blued steel Breguet hands. M. Brass full plate with cylindrical pillars secured by screws, the back plate relieved for the barrel, mainspring by Bourquin dated 1849, fusee with maintaining power, Earnshaw type spring detent escapement, two armed bimetallic compensation balance with cylindrical weights and timing screws. Free sprung blued steelelical balance spring with terminal curves.Dial diam. 75 mm.Dim. 8 x 14 x 16 cm.

Leroy No. 272, sold to the French Navy in 1867.Fine 49 hour going mahogany marine chronometer with power reserve indicator.

C. Three body mahogany box with external handles, the glazed upper section with hinged lid. Brass bowl and gimballed suspension. D. Silvered with Roman numerals, outer Arabic minute ring subsidiary seconds and Up-and-Down sector, marked: Dépot de la Marine. Gilt brass "pear" hands. M. Frosted and gilt, full plate with cylindrical pillars secured by screws, Dumas ebauche No. 741, inverted fusee with maintaining power, later mainspring made by Ducommun, dated 1892, Earnshaw type spring detent escaement, two-arm bimetallic compensation balance with cylindrical weights and timing screws, diamond end-stone, free sprung polished steel helical balance spring.Signed on the dial and mahogany box.Dial diam. 92 mm.Dim. 16,5 x 16,5 x 17,5 cm.

Rolex, Oyster Perpetual, Superlative Chronometer Officially Certified, Cosmograph, Daytona,Ref. 16520, second series of the present production, circa 1995.Fine self-winding, water-resistant down to 100 meters, stainless steel gentleman's wristwatch, with round button chronograph, register and tachometer,50 hours power reserve, stainless steel Oyster bracelet and Rolex deployant clasp.

C. three body, polished and brushed, screwed case back, buttons and Triplock crown, tachometer graduation on the bezel to 400 units per hour, sapphire crystal. D. bicolour black and white with tritium-coated steel indexes, auxiliary dials for the seconds, the 12 hours and 30 minutes registers. "Bâton" tritium-coated steel hands. M. Cal. 4030,13''', rhodium plated, 31 jewels, lever escapement, Superbalance balance adjusted to 6 positions, shock-absorber, self-compensating Breguet balance-spring, micrometer regulator.Dial, case and movement signed.Diam. 40 mm.

Rolex, Oyster Perpetual Date, Yacht-Master, Superlative Chronometer Officially Certified,Ref. 16628, 1990's.Very fine, centre second, self-winding, 18K yellow gold gentleman's wristwatch with date, and 18K yellow gold Oyster bracelet.

C. three body, massive, polished and brushed, screwed case back and crown with protected double safety lock, revolving embossed graduated bezel for calculation of diving-times, sapphire crystal. D. white enamel with round, bâton and triangular applied black and gold indexes, "Cyclope" aperture for the date. "Skeleton" tritium-coated gold hands. M. Cal. 3135, mechanical with automatic winding.Dial, case and movement signed.Diam. 40 mm.

Rolex, Oyster Perpetual, Superlative Chronometer Officially Certified, Cosmograph, Daytona,Ref. 16528, second series of the present production, circa 1995.Fine self-winding, water-resistant down to 100 meters, 18K yellow gold and diamonds gentleman's wristwatch, with round button chronograph, register and tachometer, 50 hours power reserve, 18K yellow gold Oyster bracelet and Rolex deployant clasp. Accompanied by fitted box and certificate.

C. three body, massive, polished and brushed, screwed case back, buttons and Triplock crown, tachometer graduation on the bezel to 400 units per hour, sapphire crystal. D. bicolour gold and black with diamond-set indexes, auxiliary dials for the seconds, the 12 hours and 30 minutes registers. "Bâton" tritium-coated gold hands. M. Cal. 4030, 13''', rhodium plated, 31 jewels, lever escapement, Superbalance balance adjusted to 6 positions, shock-absorber, self-compensating Breguet balance-spring, mcrometer regulator.Dial, case and movement signed.Diam. 40 mm.

Rolex, Day Date, Ref. 18348, 1990's.Fine and rare, centre second, self-winding, water-resistant, 18K yellow gold and diamonds gentleman's wristwatch with day and date, 18K yellow gold President bracelet, each central link paved with diamonds, and 18K pink gold Rolex deployant clasp.

C. three body, massive, polished and brushed, screwed case back and crown, bezel set with diamonds, sapphire crystal. D. embossed matte silver with the logo "Rolex" with diamond-set indexes, "Cyclope" aperture for the date, and for the month on the 12. "Bâton" black and gold hands. M. mechanical with automatic winding.Dial, case and movement signed.Diam. 36 mm.

Frank Muller, Endurance 24, No. 409, completed in 1997.Very fine and rare, water-resistant, stainless steel gentleman's wristwatch with round button chronograph, register, 48 hours power reserve.

C. two body, polished and brushed, screwed dedicated case back. D. orange with white tritium Arabic numerals in 24 hours, auxiliary seconds and30 minutes register dials. "Lozenge" tritium hands.M. with manual winding.Dial, case and movement signed.Diam. 37 mm.

Franck Muller, Cintrée Curvex, Ref. 2850 S6, 1990's.Fine, self-winding, tonneau shaped, water-resistant, 18K pink gold gentleman's wristwatch with 44-hour autonomy, leather strap and 18K pink gold buckle. Accompanied by fitted box and certificate.

C. two body, massive, shaped, polished, sapphire crystal. D. matte silver with painted radial Arabic numerals, auxiliary seconds dial. "Spade" blued steel hands. M. Cal. 2000, mechanical with automatic winding, 21 jewels, platinum rotor.Dial, case and movement signed.Dim. 30 x 45 mm.

Franck Muller, Cintrée Curvex, Imperial Tourbillon,No. 02, Ref. 5850, 1997.Extremely fine and rare, tonneau shaped, 18K yellow gold gentleman's wristwatch with one minute tourbillon escapement, 48 hours power reserve, blue leather strap, 18K yellow gold Franck Muller buckle. Accompanied by fitted box and certificate.

C. two body, massive, polished, transparent dedicated back with screws, sapphire crystal. D. in translucent blue enamel on guilloché gold with applied gold radial Breguet numerals, on the 6, auxiliary second dial and visible tourbillon cage. "Spade" gold hands. M. Cal. TFM95 first quality, engraved, 19 jewels, lever escapement, monometallic balance adjusted for heat, cold isochronism and 5 positions, self-compensating Breguet balance-spring, three-arm polished steel tourbillon cage.Dial, case and movement signed.Dim. 45 x 32 mm.

Louis Berthoud à Paris, No. 2521, sold toMr. Blanchard de Pigou, on 20 March 1791,for 60 Louis.Fine and very rare 18K gold, quarter dumb repeating pocket chronometer.

C. Double body, polished, by Joly (Master mark),No. 199 with Paris hallmarks for 1789. D. White enamel by Morimont (signed on the enamel backing), with Breguet numerals and subsidiary seconds. Blued steel Breguet hands with skeletonised tips. M. Gilt brass, full plate inverted, with cylindrical pillars secured by screws, fusee with chain and maintaining power, later spring detent escapement, plain brass three-arm balance beneath the dial, flat balance spring with bimetallic compensation curb on the index. Repeating on the case by depressing te pendant.Signed on the dial and back plate.Diam. 53 mm.

Rieussec, Hger. du Roi, Chaudé & Bruneau, rue Neuve des Petits Champs, No. 13. Chronographe, Brevet d'invention, No.4, circa 1845.Extremely rare and large silver cased inking chronograph with five minute progressive recorder.

C. Three body massive "quatre baguettes" polished. Gilt brass hinged cuvette. D. White enamel with Arabic numerals and subsidiary minute register. Blued-steel arrow patent inking hand. M. 26''', frosted and gilt full-plate, cylinder escapement, plain balance, flat spring. Stop watch and inking push-pieces in the band. The hand of the five minute recorder is running anti-clockwise.Signed on the cuvette.Diam. 71 mm.

Attributable to Frédéric Houriet, No. 50, Swiss,circa 1820.Very fine and rare 18K gold hunting cased, diamond-set pocket chronometer.

C. Custom made by Jules Perot (Master mark) five body, massive with engine-turned cover and back, old cut diamond set pendant and rose-cut diamond set bow. Hinged gilt brass cuvette engraved with technical details. D. White enamel with Roman numerals, outer minute ring and sunk subsidiary seconds. Blued steel Breguet hands. M. 24''', frosted and gilt, three-quarter plate, with cylindrical pillars secured by screws, the back plate indented for the barrel secured by a bridge, the fusee with chainnd maintaining power, 13 jewels, spring detent escapement, two-arm compensation balance with two trapezoidal weights and timing screws, free sprung blued steel helical balance spring.Diam. 66 mm.

Audemars Piguet, Genève, John Shaeffer Répétition Minutes, No. 2, movement No. 445578,case No. D 80683, 1990's.Very fine, minute-repeating, jumping-hour, cushion shaped, 18K yellow gold gentleman's wristwatch, with leather strap and 18K yellow gold Audemars Piguet buckle.

C. three body, massive, polished and brushed, "guilloché" bezel, transparent back. D. white enamel with black enamelled Breguet numerals, auxiliary seconds dial, aperture for the jumping-hours. "Cathédrale" white gold hand. M. Cal. 2865, gilt, "fausses côtes" decoration, 34 jewels, lever escapement, monometallic balance adjusted for heat, cold isochronism and 5 positions, shock-absorber, self-compensating flat balance-spring, repeater on gongs by means of a slide on the band.Dial, case and movement signed.Dim. 34 x 34 mm.