Vacheron & Constantin, Genève, No. 408157. Produced in the 1920s. Very fine and elegant, keyless, platinum and diamond Art Deco dress-watch.

C. Two-body, satiné, diamond-set band, rounded bezel, case back with "lozenge" shaped diamond-set initials. D. Satiné silver with applied white gold Arabic numerals. White gold "Breguet" hands. M. Cal 17 ''', rhodium plated, "fausses côtes" decoration, 18 jewels, straight line lever escapement, cut bimetallic compensation balance adjusted to 8 positions, flat balance-spring.Dial and movement signed.Diam. 41 mm.

Patek Philippe & Cie, Genève, No. 891188, case No. 420484. Produced in the 1950s. Very fine, keyless, 18K pink gold dress watch. Accompanied by a fitted box.

C. Three-body, "bassine", solid, polished, rounded bezel. D. Matte silver with applied pink gold bâton indexes and a Roman "XII", outer minute track, subsidiary seconds dial. Pink gold "bâton" hands. M. Cal. 17''', stamped with the Geneva Quality Hallmark, rhodium plated, "fausses côtes" decoration, 18 jewels, straight line lever escapement, monometallic balance, self-compensating flat balance-spring.Dial, case and movement signed.Diam. 44 mm.

International Watch Co., Schaffhausen, No. 727131, case No. 32435, retailed by Hodgson, Kennard & Co. Produced in the 1930s. Very fine, keyless, 18K yellow gold and enamel, Art Deco dress watch with chain.

C. Three-body, "bassine", solid, polished, case back with monogram, bezel, back rim and chain links with repeated black enamel Art Deco pattern. D. Matte silver with painted Arabic numerals, outer minute ring, sunk guilloché subsidiary seconds dial. Blued steel "Cathédrale" hands. M. Cal. 16''', rhodium plated, "fausses côtes" decoration, 21 jewels, straight line lever escapement, cut bimetallic compensation balance adjusted to 6 positions, Breguet balance-spring, micrometer regulator.Dial and movement signed, case numbered. Diam. 45 mm.

Zenith, Swiss, No. 2701252. Produced in the 1930s. Fine and rare, keyless, 18K yellow gold, enamel and sapphire set, Art Deco Masonic dress watch.

C. Three-body, "bassine", bezel and back rim with enamel inlay and set with 10 sapphires, case back bearing the initials "PSL". D. Matte silver with masonic emblem and painted Arabic numerals, outer minute track, subsidiary sunk "guilloché" seconds dial. Blued steel "fleur-de-lis" hands. M. Cal. 16''', gilt brass, 17 jewels, straight line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance-spring.Movement signed, case numbered.Diam. 46 mm.

Gérald Genta, Genève, No. 925, Ref. 3103.4. Manufactured in the 1990s. Very fine, astronomic, skeletonized, self-winding, water-resistant, 18K yellow gold, white gold and onyx gentleman's wristwatch with perpetual calendar, moon phases and an integrated 18K yellow and white gold Gérald Genta link bracelet and clasp.

C. Three-body, solid, polished, band decorated with gold dots, transparent case back, black onyx bezel, sapphire crystals.D. Transparent with tritium coated dot indexes, subsidiary dials for the days of the month, of the week, the months, aperture for the moon phases at 6. Tritium coated white gold "bâton" hands. M. Cal. 1019, skeletonized and hand-engraved, rhodium plated, 28 jewels, straight line lever escapement, monometallic balance, shock-absorber, self-compensating flat balance-spring, off-center rotor.Dial, case and movement signed.Diam. 34 mm.Approx. overall length: 185 mm.

Gérald Genta, Genève, "Gefica" Automatic, Ref. G. 2989.7. Manufactured in the 1990s. Fine, self-winding, water-resistant, stainless steel and brushed bronze gentleman's wristwatch with round button chronograph, registers, day and date, with leather strap and stainless steel and bronze Gérald Genta deployant clasp.

C. Three body, polished, brushed bronze lugs, crown and band with double row of dots, steel screwed-down case back, black onyx bezel, "Vendôme" type central lugs. D. Mother-of-pearl with tritium coated indexes, subsidiary dials for the seconds, the 12 hours and 30 minutes registers, apertures for day and date. "bâton" tritium coated gold hands. M. Mechanical with automatic winding.Dial, case and movement signed.Diam. 37 mm.

Audemars Piguet, Genève, Quantième Perpétuel Carré, No. 03, No. 373653, case No. D 51035. Manufactured in the 1990s. Extremely fine and rare, square, midsized, astronomic, 18K yellow gold wristwatch with perpetual and lunar calendar, moon phases, and 18K yellow gold Audemars Piguet buckle.

C. Two-body, solid, polished, transparent back with screws, teardrop lugs. D. White with applied yellow gold baton indexes, subsidiary dials for the days of the month, of the week and the months, sector graduation for the age of the moon, aperture for the moon phases. Burnished steel "feuille" hands. M. Cal. 2003/2, rhodium plated and engraved brass, 18 jewels, straight line lever escapement, monometallic balance adjusted for heat, cold isochronism and 5 positions, shock-absorber, self-compensating flat balance-spring. Signed on the dial and the movement, numbered on the case.Dim. 27 x 37 mm.

Audemars Piguet, Genève "Quantième perpetuel automatique No 132", No. 322083, case No. 76016. Manufactured in 1989. Very fine and very rare astronomic, self-winding, 18K yellow gold mid-sized wristwatch with perpetual calendar, moon phases and an 18K yellow gold Audemars Piguet buckle.

C. Two-body solid, polished and brushed, stepped bezel, curved lugs.D. White with applied gold baton indexes, subsidiary dials for the days of the month, the week, the months, sector graduated for the age of the moon, aperture for the moon phases. Yellow gold "bâton" hands. M. Cal. 2132 rhodium plated, "fausses côtes" decoration, 22 jewels, straight line lever escapement, monometallic balance adjusted to heat, cold, isochronism and 5 positions, shock-absorber, self-compensating flat balance-spring, 21K gold rotor.Dial, case and movement signed.Diam. 30 mm.

Audemars Piguet, Genève, "Quantieme Perpetuel Automatique No. 1113", movement No. 226782, case No. B 86762, Ref. 762. Produced in the 1980s. Very fine, octagonal, astronomic, self-winding, 18K yellow gold gentleman's wristwatch with perpetual calendar, moon phases and an integrated, 18K yellow gold Audemars Piguet link bracelet and clasp.

C. Three-body, solid, polished, sapphire crystal. D. Champagne with applied yellow gold bâton indexes, subsidiary dials for the days of the month, of the week, the months, graduation for the age of the moon, aperture for the moon phases. Yellow gold "bâton" hands. M. Cal. 2120/1, rhodium plated, "fausses côtes" decoration, 36 jewels, straight line lever escapement, monometallic balance adjusted to heat, cold, isochronism and 5 positions, shock-absorber, self-compensating flat balance-spring, 21K gold rotor segment. Dial, case and movementsigned. Approx. overall length: 175 mm.Diam. 36 mm.

Urban Jürgensen, Copenhagen, No. 001, Ref. 5300. Produced in the late 1990s. Very fine and rare, astronomic, self-winding, water-resistant, platinum gentleman's wristwatch with perpetual calendar, moon phases and a platinum Urban Jürgensen buckle.

C. Two-body, solid, polished and brushed, rounded stepped bezel, teardrop lugs, sapphire crystal. D. "Guilloché" silver with painted radial Roman numerals on an outer plain reserve, silver ring dials for the days of the week, of the month and apertures for the months and the moon phases. Yellow gold "Jürgensen" hands. M. Cal. 5031, rhodium plated, "fausses côtes" decoration, 40 jewels, straight line lever escapement, monometallic balance adjusted to 5 positions, shock-absorber, self-compensating flat balance-spring, 21K gold off-center rotor.Dial, case and movement signed.Diam. 38 mm.

Urban Jürgensen, Copenhagen, No. 143690. Produced in the late 1990s. Very fine and rare, astronomic, self-winding, water-resistant, platinum gentleman?s wristwatch with square button chronograph, registers, 50-hour autonomy, triple date calendar, moon phases and a platinum Urban Jürgensen deployant clasp.

C. Two-body, solid, polished and brushed, rounded stepped bezel, teardrop lugs, sapphire crystal. D. "Guilloché" silver with painted radial Roman numerals on an outer plain reserve, subsidiary silver ring dials for the seconds, the 12-hour and 30-minute registers, apertures for the days of the week, of the month, the months and the moon phases. Blued steel "Breguet" hands. M. Cal. 410Z, rhodium plated, "oeil-de-perdrix" decoration, 31 jewels, straight line lever escapement, monometallic balance, shock-absorber, self-compensating flat balance-spring.Dial and case signed, movement signed "Zenith".Diam. 40 mm.

Urban Jürgensen, Copenhagen, Ref. 4027. Produced in the 1990s. Fine and rare, astronomic, self-winding, water-resistant, 18K yellow gold gentleman?s wristwatch with square button chronograph, registers, 50-hour autonomy, triple date calendar, moon phases and an 18K yellow gold Urban Jürgensen buckle.

C. Two-body, solid, polished and brushed, rounded stepped bezel, screwed-down case back, teardrop lugs,sapphire crystal. D. "Guilloché" silver with painted radial Roman numerals on an outer plain reserve, subsidiary silver ring dials for the seconds, the 12-hour and 30-minute registers, apertures for the days of the week, of the month, the months and the moon phases. Yellow gold "Breguet" hands.M. Cal. 3019, rhodium plated, 31 jewels, straight line lever escapement, monometallic balance, shock-absorber, self-compensating flat balance-spring.Dial and case signed.Diam. 40 mm.

Urban Jürgensen, Copenhagen, No. 150082. Produced in the late 1990s. Very fine and rare, astronomic, self-winding, water-resistant, platinum gentleman?s wristwatch with square button chronograph, registers, 50-hour autonomy, triple date, moon phases and a platinum Urban Jürgensen buckle.

C. Two-body, solid, polished and brushed, rounded stepped bezel, teardrop lugs, sapphire crystal. D. "Guilloché" black with silver painted radial Roman numerals on an outer plain reserve, subsidiary silver ring dials for theseconds, the 12-hour and 30-minute registers, apertures for the days of the week, of the month, the months and the moon phases. White gold "Breguet" hands. M. Cal. 410Z, rhodium plated, "oeil-de-perdrix" decoration, 31 jewels, straight line lever escapement, monometallic balance adjusted to 5 positions, shock-absorber, self-compensating flat balance-spring.Dial and case signed.Diam. 40 mm.

F.P. Journe, "Invenit et Fecit", "Chronomètre à Résonance", No. 259/02R. Produced in 2002, sold on October 11, 2002. Very fine and rare, platinum, two-time zone, world's first wristwatch chronometer with resonance controlled twin independent movements, 40 hour power reserve indication and a platinum F.P. Journe buckle. Accompanied by a wooden fitted box and a certificate.

C. Three-body, solid, polished, transparent case back with screws, top and side crowns engine-turned with a knurled pattern, sapphire crystals. D. Twin "guilloché" silver with concentric radial Arabic numerals and minute rings, off-set subsidiary seconds screwed onto a matte 18K yellow gold dial plate, up-and-down indication at 12. Blued steel "Journe"-style hands. M. Cal. F.P. Journe 13''', rhodium plated, "fausses côtes" decoration, twin independent complete trains set on a single plate, 37 jewels, twin straight line lever escapements, twin beryllium four-arm balances with 4 adjustable timing weights, shock-absorbers, self-compensating free-sprung Invar balance-springs. 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 2 balances in order to find the most efficient position for resonance synchronization. The crown at 4 will synchronize the seconds hands.Dial and case signed.Diam. 38 mm.

Roger Dubuis, Horloger Genevois, "Hommage Biretrograde Perpetual Calendar Chronograph", No. 113. Produced in the 1990s. Very fine and rare, oversized, astronomic, 18K white gold gentleman's wristwatch with round button chronograph, register, bi-retrograde perpetual calendar, moon phases and an 18K white gold Roger Dubuis buckle. Accompanied by a fitted box and certificate.

C. Two-body, solid, polished and brushed, screwed-down transparent case back, concave stepped bezel, domed sapphire crystal, sapphire crystal in back edged with the "RD" logo. D. Matte silver with painted indexes, outer graduation for the 52 weeks of the year, subsidiary dials for the seconds, the 30-minute register and the months, sector for the retrograde days of the week and the month, apertures for the moon phases at 12 and the leap year at 5. White gold "feuille" hands, blued steel "cathédrale" hands for the retrograde indications. M. Cal. RD 5710, stamped with the Geneva Quality Hallmark, rhodium plated, "fausses côtes" decoration, 21 jewels, straight line lever escapement, monometallic balance adjusted to 5 positions, shock-absorber, self-compensating Breguet balance-spring, micrometer regulator.Dial, case and movement signed.Diam. 43 mm.

Chronoswiss, "Régulateur-Tourbillon", No. 028, Ref. CH 3120. Manufactured in the 1990s. Very fine and rare, water-resistant, platinum gentleman's wristwatch with regulator dial, one minute tourbillon regulator, double-barrel, 72 hours autonomy and a platinum Chronoswiss buckle.

C. Three-body, solid, polished and brushed, transparent screwed-down case back, ribbed back and front bezel, straight lugs, white gold screwed bars, sapphire crystals. D. Solid "guilloché" platinum with painted radial Arabic numerals on an outer plain reserve, subsidiary off-center ring dial with painted Roman numerals at 12 for the hour, aperture for the visible tourbillon cage at 6. Blued steel "spade" hands. M. Cal. 361, rhodium plated, "fausses côtes" decoration, 23 jewels, straight line lever escapement, two spring barrels, ball bearing tourbillon cage, blued screws, monometallic balance, self-compensating Breguet balance-spring.Dial, case and movement signed.Diam. 38 mm.

Audemars Piguet, Genève, "Royal Oak", No. 127, case No. D 35098. Produced in the 1990s. Very fine and rare, octagonal, 18K white gold and diamonds gentleman's quartz wristwatch with date and an integrated 18K white gold Audemars Piguet bracelet with deployant clasp. Accompanied by a fitted box and certificate.

C. Three-body, solid, polished and brushed, octagonal bezel set with 32 baguette diamonds, total carat weight: 2.09, 8 white gold hexagonal nuts embanked in 8 white gold screws on the case back, sapphire crystal.D. "Pavé" diamond dial with emerald-set indexes, aperture for the date. Black "bâton" hands.M. Cal. 2225, with quartz standardization.Dial, case and movement signed.Diam. 33 mm.

Audemars Piguet, Le Brassus, "Jules Audemars, Sunrise - Sunset - Equation du Temps", No. 506015, case No. E 50945, Ref. 25934OR. Produced in a limited quantity each year since 2000. Very fine and important, astronomic, self-winding, water-resistant, 18K pink gold gentleman's wristwatch with perpetual calendar, leap year, moon phases, sunrise and sunset set for the city of Houston, equation of time, 40 hours autonomy and an 18K pink gold Audemars Piguet deployant clasp. Accompanied by a fitted box and a certificate.

C. Three-body, solid, polished and brushed, transparent case back with 5 screws, engraved bezel with graduation for the equation of time and Houston's latitude of 29° 45? 47?? N, straight lugs, sapphire crystals. D. "Guilloché" anthracite with applied luminous markers and pink gold triangular indexes, subsidiary dials for the days of the month, of the week at 6, 12-hour sunrise dial at 9 and 24-hour sunset dial at 3, aperture for the leap year at 1, the months and the aperture for the moon phases at 12. Luminous pink gold "alpha" hands. M. Cal. 2120/4, rhodium plated, "fausses côtes" decoration, 41 jewels, straight line lever escapement, Gyromax balance adjusted to heat, cold, isochronism and 5 positions, shock-absorber, self-compensating free-sprung flat balance-spring, hand-engraved and skeletonized rotor with 21K gold segment.Dial, case and movement signed.Diam. 39 mm.For a note on Audemars Piguet, see lot 333.

A. Lange & Söhne, Glashütte, B / Dresden, No. 15295. Produced in the early 1900s. Very fine, keyless, 18K pink gold pocket watch.

C. Four-body, "bassine et filets", solid, polished, gold hinged cuvette. D. White enamel with painted Roman numerals, outer minute ring, subsidiary sunk seconds dial. Blued steel "spade" hands. M. Cal. 19 1/2 ''', frosted gilt, 3/4 plate typical Glashütte caliber, 18 jewels, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance-spring, gold escape wheel and pallet fork.Diam. 52 mm.Dial and movement signed, case numbered.

Ulysse Nardin, Le Locle & Genève, "Chronometer", No. 19448, retailed by Türler, Zürich. Very fine and rare, keyless, 18K yellow gold pocket chronometer. Accompanied by a fitted box.

C. Three-body, "bassine", solid, polished, gold hinged cuvette engraved "Chronomètre No. 19448 Bulletin 1ère class del' Observatoire Astronomique de Neuchâtel". D. White enamel with painted Arabic numerals, outer minute track, sunk subsidiary seconds dial. Blued steel "spade" hands. M. Cal. 19''', rhodium plated, "fausses côtes" decoration, 21 jewels, cut bimetallic compensation balance with gold screws adjusted to 8 positions, blued steel Breguet balance-spring, "swan neck" micrometer regulator.Dial, case and movement signed.Diam. 52 mm.