Louis Audemars, Brassus, Swiss, No. 8133, made for Charles Oudin, Horloger de S.M. l'Empereur, Horloger de la Marine, 52, Palais Royal, Paris, Medailles et Brevets de 1806 a 1861, No. 18709, circa 1868. Very fine and rare 18K gold, keyless quarter repeating pocket chronometer.

C. Four body, massive, " bassine et filets " , polished. Hinged gold cuvette. D. White enamel two piece, the sunk centre with gold rim. Gold "poker and beetle" hands. M. 19"', gilt brass, unusual bar calibre with gold wheel train, fusee and chain, maintaining power, 26 jewels, spring detent escapement, two-arm compensation balance with gold poising and timing screws, blued steel helical spring with terminal curves. Repeating on gongs with slide in the band. Signed on cuvette, Louis Audemars Trade mark on the case. Diam. 54 mm.

Albert H. Potter & Co., Geneva, No. 4, made circa 1890. Rare 18K gold, hunting cased, keyless pocket chronometer.

C. Three body, massive, "bassine et filets" engineturned, the cover centre with a small monogram. Glazed gold cuvette. D. White enamel with Roman numerals and sunk subsidiary seconds. Blued steel Breguet hands. M. 21 -, nickel plated, patented caliber, spotted decoration, 21 jewels, majority in screwed gold settings, great wheel screwed on to the barrel cap. Patented pivoted detent escapement, shock-absorbing counterpoised and off set passing spring. Two-arm cut bimetallic balance, free sprung helical balance spring with terminal curves. Signed on the dial and movement. Diam. 56 mm.

Albert H. Potter & Co., Chicago (U.S.A.), made circa 1880, timed by James Murset. Rare keyless pocket chronometer workshop case.

C. Three piece, massive with glazed back and milled bezels. D. White enamel with Arabic numerals and sunk subsidiary seconds. Blued steel Breguet hands. M. 21 "' , nickel plated, patented calibre, the bridges with "fausses cotes " decoration, 21 jewels, majority in screwed gold settings, great wheel screwed on to the barrel cap. Patented pivoted detent escapement, shock-absorbing counterpoised and off-set passing spring. Two-arm cut bimetallic balance, free sprung spherical balance spring. Signed on the movement. Dial signed by the precision timer. Diam. 56 mm.

Unsigned, Swiss, circa 1890. Very fine 18K gold hunting cased keyless watch.

C. Four body, massive, "bassine et filets " , polished, a monogram engraved on the cover. Hinged gold cuvette and milled inside bezel. D. White enamel with Roman numerals, outer Arabic minute ring and sunk subsidiary seconds. Gold "spade " hands. M. 19 "' , nickel plated, unusual "fausses cotes " decoration partly in a sun-burst pattern, gold wheel train, 18 jewels, straight line lever escapement, cut bimetallic balance, blued steel helical balance spring with elaborated micrometric index. Diam. 51 mm.

F. Luthi, 26, rue Cardinet, Paris, circa 1900. Fine 18K gold hunting cased keyless lever pocket chronometer, in the original rose-wood fitted box.

C. Four body, massive, "demi-bassine " , polished, gold monogram J.A.L." applied on the cover. Hinged gold cuvette. D. White enamel with Breguet numerals and sunk subsidiary seconds. Blued steel "spade " hands. M. 18"', gilt brass three quarter plate, 18 jewels, counterpoised straight line lever escapement, cut bimetallic balance, blued steel helical balance spring with terminal curves and swan neck micrometric index. Signed on the dial and movement. Diam. 54 mm.

L. Leroy et Cie., Horlogers de la Marine, 7 Bd. de La Madeleine, Paris, No. 67574, made in 1910. Very fine 18K gold keyless pocket lever chronometer, Bulletin de Premiere Classe de l'Observatoire National de Besancon, No. 8014, in 1910, was awarded the Gold Medal at the timing contest with a total of 248,2 marks.

C. Three body, massive, "bassine", polished, the back engraved wit a monogram. Hinged gold cuvette. D.White enamel, with Roman numerals, outer Arabic minute ring and sunk subsidiary seconds. Gold "spade" hands. M. 18 "' , gilt brass with punch-mark in form of a viper ' s head set by the Observatory of Besancon, 20 jewels, 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. Diam. 51 mm.

L. Leroy & Cie., Horlogers de la Marine, 7 Bd. de La Madeleine, Paris, No. 9417, made in 1920. Very fine 18K gold keyless pocket lever chronometer with chronograph and instantaneous 60-minute recorder. Bulletin de Premiere Classe de l'Observatoire National de Besancon, No. 12575, in 1920, with a total of 161 marks.

C. Three body, massive, "bassine", polished". Hinged gold cuvette. D. White enamel with Arabic numerals, outer minute and chronograph rings, sunk subsidiary seconds and minute register. Gold "pear" hands. M. 18" ', gilt brass with punch-mark in form of a viper' s head set by the Observatory of Besancon, 24 jewels, straight line lever escapement, brass-invar Guillaume balance adjusted by Jaccard, blued steel, balance spring with terminal curve. Chronograph with visible work and button on the winding crown. Signed on the dial, case and movement, numbered on the case and movement. Accompanied by copies of the timing certificates. Diam. 52 mm.

L. Leroy & Cie., No. 23535, case No. 16389, circa 1930. Elegant 18K gold, keyless dress watch.

C. Three body, massive "Empire", polished. Hinged gold cuvette. D. White enamel with Breguet numerals and sunk subsidiary seconds. Gold Breguet hands. M. 17"', frosted and gilt, 15 jewels, straight line lever escapement, cut bimetallic balance, Breguet balance spring. Signed on the dial, case and movement. Diam. 46 mm.

L. Leroy & Cie. No. 1199, case No. 10224, made in 1914. Very fine and elegant 18K gold, keyless pocket chronometer, with chronograph and instantaneous 60 minute recorder. Bulletin de Premiere classe de l'Observatoire National de Besancon, No. 1199, in 1914.

C. Three body, massive, "Empire", polished, the back with the blue champleve enamel initials "H.M.S." within a white enamelled circular line.Hinged gold cuvette. D. Gold engine turned with Breguet numerals on a matt chapter ring, subsidiary dials for subsidiary seconds and minute register. Blued steel Breguet hands. M.18 "' , gilt brass with punch-mark in form of a viper's head set by the Observatory of Besancon, 23 jewels, straight line lever escapement, brass-invar Guillaume balance, blued steel balance spring with terminal curve adjusted by Grogg. Chronograph with visible work, the button on the winding crown. Signed on the dial, cuvette and movement. Accompanied by copies of the timing certificates. Diam. 50 mm.

Unsigned, Swiss, No. 44075, made by Henchoz Freres and regulated by A. Hillgren, circa 1895. Extremely fine, 18K gold, hunting cased, keyless pocket chronometer with one minute tourbillon regulator.

C. Four body, massive, "bassine et filets, " polished. Gold cuvette. D. White enamel with radial Arabic numerals and sunk subsidiary seconds. Blued steel pear hands. M. 19 "' , frosted and pale gilt, Technicum calibre, 15 jewels, spring detent escapement, cut bimetallic balance, blued steel balance spring with terminal curve. One minute tourbillon with threearm polished steel cage, driven by the minute wheel. Accompanied by copies of the timing certificates. Diam. 56 mm.

Jules Jorgensen, Copenhagen, Swiss, No. 10091, made in 1880. Fine 18K gold hunting cased, keyless minute repeating watch with split second's chronograph.

C. Four body, massive, "bassine et filets", polished, the cover engraved with a monogram. Hinged gold cuvette with engine-turned border. D. White enamel with Roman numerals, outer minute and chronograph ring and sunk subsidiary seconds. Blued steel Breguet hands. M. 20 "' , nickel plated, 31 jewels, straight line lever escapement, cut bimetallic balance, Breguet balance spring. Repeating on gongs with slide in the band. Split seconds chronograph with visible work and push pieces in the band. Special Jules Jorgensen hand-setting device by means of the folding bow patented on 15 January 1867. Accompanied by photocopy of the original workshop log. Signed on the dial, case and movement. Diam. 53 mm.

J. Alfred Jirgensen, Copenhagen, No. 903, movement completed in 1878; cased and sold by Musee du Locle, Chateau des Monts (Switzerland). Fine 18K gold hunting cased, keyless watch. C. Three body, massive "pommes et filets " with reeded band and engine-turned back. D. White enamel with Roman numerals and sunk subsidiary seconds. Blued steel Breguet hands. M. Glazed 16"' , nickel plated, gold wheel train, 18 jewels, counterpoised straight line lever escapement, cut bimetallic balance, Breguet balance spring. Signed on the dial, case and movement. Accompanied by photocopy of the original workshop log. Diam. 48 mm. c 1 D 21-51 M 4 B Estimate: SFr. 4'000 - 5'000

C. Three body, massive "pommes et filets " with reeded band and engine-turned back. D. White enamel with Roman numerals and sunk subsidiary seconds. Blued steel Breguet hands. M. Glazed 16"' , nickel plated, gold wheel train, 18 jewels, counterpoised straight line lever escapement, cut bimetallic balance, Breguet balance spring. Signed on the dial, case and movement. Accompanied by photocopy of the original workshop log. Diam. 48 mm.

Jules Jorgensen, Copenhagen and Switzerland, No. 15176, made in 1894. Very fine and rare "ingoldage" (chromium plated) deck watch, in mahogany fitted deck box.

C. Three piece " bassine et filet", polished with glazed back. D. Silvered with Roman numerals, outer minute ring and sunk subsidiary seconds. Blued steel "pear" hands. M. 20"', nickel plated, "fausses cotes" decoration, 21 jewels in screwed settings, counterpoised straight line lever escapement, cut bimetallic balance, 10 adjustments, Breguet balance spring. Signed on the dial and movement. Accompanied by photocopy of the original workshop log. Diam. 64 mm.

Cartier, Paris, "Carree a coins arrondis" , entered in the registers on December 1924. Very fine and rare, square, 18K yellow gold lady ' s wristwatch with 18K pink gold Cartier deployant clasp.

C. massive, polished, stepped bezel, sapphire set winding-crown, screwed bars. D. matt silver with painted radial Roman numerals. "Breguet " blued steel hands. M. 8"' signed European Watch & Clock Co., rhodium plated, "fausses cotes" decoration, 19 jewels, lever escapement, cut bimetallic balance, 8 adjustments, flat balance spring. Dial and movement signed, numbered on the case. Dim. 20 x 20 mm.

Cartier, Paris, "Tank Chinois", entered in the registers on October 1947. Very fine and rare square, 18K yellow gold gentleman's wristwatch with 18K pink gold Cartier deployant clasp.

C. massive, polished, sapphire set winding-crown. D. white with painted radial Roman numerals. "Baton " blued steel hands. M. 9"' signed European Watch & Clock Co., rhodium plated, "fausses cotes " decoration, 18 jewels, lever escapement, cut bimetallic balance adjusted to temperature, 2 adjustments, flat balance spring. Dial, case and movement signed. Dim. 24 x 30 mm.

Cartier, Paris, entered in the registers on November 1956. "Montre pince a billets", 18K pink gold, keyless money clip keyless watch.

C. Square polished with sapphire cabochon set winding crown within the money clip. D. Matt silver with Roman numerals. Blued steel "Breguet" hands. M. Rhodium plated, 8 "' , European Watch & Clock Co., "fausses cotes " decoration, 19 jewels, straight line lever escapement, cut bimetallic balance, eight adjustments, Breguet balance spring. Signed on the dial and movement. Dim. 53 x 40 mm.

Cartier, 1940 `s. Very fine and rare, rectangular, 18K yellow gold lady 's wristwatch with a special system of two extended lateral lugs, holding the watch parallel to the bracelet, with 18K pink gold Cartier deployant clasp.

C. massive, polished, bevelled bezel. D. matt silver with painted radial Roman numerals. "Baton" blued steel hands. M. 7 1/2"' signed LeCoultre, rhodium plated, 15 jewels, lever escapement, monometallic balance, self compensating flat balance spring. Dial and movement signed, numbered on the case. Dim. 26 x 22 mm.

Cartier, Paris, "Tank Cintree " , entered in the registers on January 1926. Fine, rectangular curved, 18K yellow gold gentleman's wristwatch with 18K pink gold Cartier deployant clasp.

C. massive, polished, sapphire set winding-crown. D. white with painted radial Roman numerals. "Baton" blued steel hands. M. 7 "' signed European Watch & Clock Co., rhodium plated, "fausses cotes" decoration, 18 jewels, lever escapement, cut bimetallic balance adjusted to temperatures and 2 positions, flat balance-spring. Dial, case and movement signed. Dim. 21 x 36 mm.

Cartier, Paris, "Duo-Plan", 1960's. Fine rectangular, 18K yellow gold gentleman's wristwatch with 18K yellow gold bracelet "a mailles" and pink gold deployant clasp.

C. massive, polished, dust protecting cap, back winder. D. white with painted Roman numerals. "Baton" gold hands. M. 4 "' signed Jaeger, "Duo-Plan", baguette, rhodium plated, 15 jewels, lever escapement, cut bimetallic balance adjusted to temperatures, 2 adjustments, flat balance spring. Dial and movement signed, numbered on the case. Dim. 19 x 34 mm.

Cartier, New York, "Tank", 1960's. Fine rectangular, 18K yellow gold gentleman's wristwatch.

C. massive, polished, sapphire set winding-crown. D. white with painted Roman numerals. "Baton" blued steel hands. M. 9 "' signed Audemars Piguet, rhodium plated, "fausses cotes " decoration, 18 jewels, lever escapement, monometallic balance, adjusted for heat, cold isochronism and 5 positions, antishock system, self compensating Breguet balance spring. Dial case and movement signed. Dim. 24 x 30 mm.