H. R. Ekegrén, No. 78942, Geneva, made byE. Koehn, for J. E. Caldwell & Co., Philadelphia,circa 1910.Very fine 18K gold keyless watch with split-seconds chronograph and instantaneous 30-minute register.

C. Three body, massive, demi-bassine, polished with concealed hinge. Hinged gold cuvette. D. White enamel with Breguet numerals, sunk subsidiary seconds and minute register. Blued steel Breguet hands. M. 16''', rhodium plated, 27 jewels, straight line lever escapement, cut bimetallic balance, Breguet balance spring. Chronograph with visible work, the split-seconds chronograph push-piece in the band.Signed on the dial, cuvette and movement.Diam. 45 mm.

H. R. Ekegrén, Geneva, No. 78948, made byE. Koehn, for J. E. Caldwell & Co., Philadelphia,circa 1910.Fine and elegant 18K gold, very slim keyless, minute repeating watch.

C. Three body, masive, demi-bassine, polished with concealed hinge. Hinged gold cuvette. D. White enamel with Breguet numerals and sunk subsidiary seconds. Blued steel Breguet hands. M. 17''', rhodium plated, 31 jewels, straight line lever escapement, cut bimetallic balance, eight adjustments, Breguet balance spring with swan neck micrometric index. Repeating on gongs with slide in the band.Signed on the dial, case and movement.Diam. 46 mm.

H. R. Ekegrén, No. 84522, Geneva, made byE. Koehn, for J. E. Caldwell & Co., Philadelphia,circa 1915.Very fine 18K gold keyless, jewelled with blue sapphires.

C. Three body, massive, "demi-bassine" with concealed hinges, polished. Hinged gold cuvette engraved with a dedication dated 1916. D. White enamel with "Empire" Roman numerals and sunk subsidiary seconds. Gold Breguet hands. M. 19''', nickel plated, with going barrel, 21 jewels in blue sapphires, counterpoised straight line lever escapement, brass-invar Guillaume balance, eight adjustments, Breguet balance spring with swan-neck micrometric index.Signed on the dial, case and movement.Diam. 51 mm.

H. R. Ekegrén, No. 90193, Geneva, made byE. Koehn, for J. E. Caldwell & Co., SPR & Co.,circa 1925.Very fine and rare, jumping hours, rectangular, platinum gentleman's wristwatch.

C. two body, massive, polished, hinged case back, bevelled bezel. D. matt silver with painted Arabic numerals, aperture for the jumping hours. "Moderne" blued steel hand. M. 10''', rhodium plated, "fausses côtes" decoration, 18 jewels, lever escapement, cut bimetallic balance, 8 adjustments, Breguet balance spring.Dial, case and movement signed.Dim. 25 x 38 mm.

H. R. Ekegrén, No. 90195, Geneva, made byE. Koehn, for J. E. Caldwell & Co., SPR & Co.,circa 1925.Very fine and rare, jumping hours, rectangular,18K yellow gold gentleman's wristwatch.

C. two body, massive, polished, hinged case back, bevelled bezel. D. matt silver with painted Arabic numerals, aperture for the jumping hours. "Moderne" blued steel hand. M. 10''', rhodium plated, "fausses côtes" decoration, 18 jewels, lever escapement, cut bimetallic balance, 8 adjustments, Breguet balance spring.Dial, case and movement signed.Dim. 25 x 38 mm.

Albert H. Potter & Co., Geneva, circa 1870.Unique, 18K pink gold, hunting cased, keyless, pocket lever chronometer with twelve seconds revolving tourbillon regulator.

C. Custom made, four body, massive, "bassine et filets", polished. D. Custom made white enamel with Roman numerals and sunk subsidiary seconds. Blued steel Breguet hands. M. 21''', nickel plated, patented calibre, spotted decoration, 15 jewels, majority in screwed gold settings, great wheel screwed on to the barrel cap. Lever escapement of very original type, the escape wheel being stationary and the anchor moving around with the cage five times per minute, cut bimetallic balance, free sprung Brguet balance spring.Diam. 56 mm.

Albert H. Potter & Co. Geneva, No. 24, made,circa 1880.Rare 18K gold, hunting cased, keyless pocket chronometer.C Three body, massive, bassine et filets, engine-turned. D. White enamel with Roman numerals, outer Arabic minute ring and sunk subsidiary seconds. Blued steel Breguet hands. M. 21''', nickel plated, patented caliber, fausses côtes 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, helical balance spring, free sprung with trminal curves.Signed on the dial, case and movement.Diam. 56 mm.

Albert H. Potter & Co. Geneva, No. 305, made,circa 1900.Rare 18K gold, hunting cased, keyless minute repeating watch.

C. Three body, massive, "bassine", polished. D. White enamel with Roman numerals and sunk subsidiary seconds. Blued steel Breguet hands. M. Glazed, 20''', nickel plated, 29 jewels, partly in screwed settings, counterpoised straight line lever escapement, cut bimetallic balance, Breguet balance spring with swan neck micrometric index. Repeating on gongs with slide in the band.Signed on the dial and movement.Diam. 52 mm.

Tiffany & Co., New York, No. 15734, made in Geneva for the American Market, circa 1870.Fine and unusual 18K pink gold, keyless watch with split-seconds chronograph.

C. Four body, massive, "bassine et filets", polished. Hinged gold cuvette. D. White enamel with small eccentric sunk Roman chapter ring on the top, for hours and minutes sunk subsidiary seconds, symmetrically disposed below, red Arabic chronograph ring on the bezel's border. Blued-steel Breguet hands. M. 19''', nickel plated, three-quarter plate, "fausses côtes" decoration, 23 jewels, counterpoised straight line lever escapement, cut bimetallic balance, Breguet balance spring. Chronograph with vsible work released from the winding-crown, split-seconds push-piece in the band.Signed on the dial, case and movement.Diam. 52 mm.

E. H. Jaccard & Cie., Genève, No. 26274, made for the South American Market, circa 1890.Very fine 18K pink gold, hunting cased, moon phase, astronomical, keyless minute repeating watch with perpetual calendar and chronograph, in original mahogany fitted box.

C. Four body, massive, "pomme et gouges", engine-turned, the cover with an engraved monogram. Hinged gold cuvette. D. White enamel with Roman numerals, outer Arabic minute and chronograph rings, subsidiary dials for the days of the week, the months of the leap year cycle, the dates and the seconds with inner moon phase aperture. Blued steel "spade" hands. M. Glazed, 20''', rhodium plated, "fausses côtes" decoration, 32 jewels, counterpoised straight line lever escapement, cut bimetallic balance,Breguet balance spring with micrometric index. Repeating on gongs with slide in the band. Chronograph with visible work, and push-piece in the band.Signed on the case and movement.Diam. 58 mm.

Fritz Piguet & Bachmann, Genève, No. 7416,made in 1886.Very fine, 18K pink gold, hunting cased, keyless pocket lever chronometer, awarded the first prize at the contest organised at the Observatory of Geneva in 1886. In the original mahogany fitted box.

C. Four body, massive, "bassine et filets", polished, the cover engraved with a monogram, the back with a coat-of-arms. Hinged gold cuvette engraved with technical details and the awarded prize. D. White enamel with Roman numerals and sunk subsidiary seconds. Blued steel "spade" hands. M. 18''', nickel plated three-quarter plate, "fausses côtes" decoration, 20 jewels, counterpoised straight line lever escapement, cut bimetallic balance, palladium helical balance spring with terminal curves and san neck micrometric index.Signed on the cuvette.Diam. 55 mm.Accompanied by photocopies of the Timing Certificates.

Alexis Favre, Genève, No. 1762, Etabli expressément pour Paul Ledoux, made in 1891.Very fine, 18K gold, keyless pocket lever chronometer, awarded the first prize at the contest organised at the Observatory of Geneva in 1891.

C. Four body , massive, "bassine", polished, the back with the champlevé red and blue flinqué enamelled monogram P.L. Hinged gold cuvette engraved with the awarded prize. D. White enamel with Roman numerals and outer Arabic minute ring, sunk subsidiary seconds on chapter "III" and symmetrical circular cartouche for the signature. Blued steel "spade" hands. M. 19''', Extra supérieur gilt brass,19 jewels in gold screwed settings, straight line lever escapement, cut bimetallic balance, palladium balance spring with terminal curve.Signed on the dial, case and movement.Diam. 52 mm.Accompanied by photocopies of the Timing Certificates.

Universal, Genève, circa 1910.Very fine and rare, 18K pink gold gentleman's wristwatch with single button chronograph on the crown, register and pulsometer.

C. three body, massive, polished, hinged case back, mobile wire lugs. D. white enamel with painted Arabic numerals, auxiliary seconds and 30-minute register dials, outer pulsometer graduation for 30 pulsations. "Spade" blued steel hands. M. 13''', gilt brass,17 jewels, lever escapement, cut bimetallic balance, Breguet balance spring, the coaxial single button on the winding-crown is for start-stop and return to zero functions of the chronograph.Signed on the dial, numbered on the case.Diam. 33 mm.

Universal Watch, Genève, Autorem, circa 1925.Fine and rare, octagonal, self-winding, gentleman's wristwatch, Swiss Patents No. 91051 and 91463.

C. Signed Empire Watch Co., Geneva, nickel chrome, two body, polished, hinged case back, bevelled bezel, wire lugs. D. two-tone silver with painted and radium-coated indexes, auxiliary seconds dial. "Lozenge" radium-coated blued steel hands. M. 9''', rhodium plated, 15 jewels, lever escapement, cut bimetallic balance, flat balance spring, rotor à butoirs.Dial, case and movement signed.Dim. 28 x 28 mm.

Universal Watch, Genève, 8 Days, circa 1930.Fine and unusual, rectangular, stainless steel gentleman's wristwatch with 8 days power reserve.

C. two body, polished, hinged case back, engraved band, concave lugs, lapidated bezel. D. matt silver with painted Arabic numerals, auxiliary seconds dial. "Breguet" blued steel hands. M. 10''', tonneau, gilt brass, 17 jewels, lever escapement, monometallic balance, self-compensating flat balance spring.Signed on the dial, numbered on the case.Dim. 26 x 43 mm.

Universal Genève, Uni-Compax, No. 930050,Ref. 12459, circa 1942.Fine, 18K yellow gold gentleman's wristwatch with square button chronograph, register, tachometer and telemeter.

C. two body, polished and brushed. D. matt silver with applied gold indexes and Arabic numerals, auxiliary seconds and 45-minute register dials, outer tachometer and telemeter graduations. "Feuille" yellow gold hands. M. 13''', gilt brass, 17 jewels, lever escapement, monometallic balance, self-compensating Breguet balance spring.Dial, case and movement signed.Diam. 34 mm.

Universal Genève, Compax, No. 983230,Ref. 22498, 1930's.Fine, stainless steel Enversteel gentleman's wristwatch with square button chronograph, registers and tachometer.

C. three body, polished, extended lapidated lugs.D. matt silver with applied gold Arabic numerals, auxiliary "guilloché" dials for the seconds, the12 hours and 30-minute registers, outer tachometer graduation. "Feuille" gilt hands. M. 14''', gilt brass,17 jewels, lever escapement, monometallic balance, self-compensating Breguet balance spring.Dial, case and movement signed.Diam. 34 mm.

Universal Genève, Compax, No. 1046010,Ref. 12223, circa 1944.Very fine and rare, water-resistant, 18K yellow gold gentleman's wristwatch with round button chronograph, registers and pulsometer.

C. two body, polished, screwed case back, dust protecting cap. D. matt silver with applied gold indexes and Arabic numerals, auxiliary dials for the seconds, the 12 hours and 30-minute registers, outer pulsometer graduation for 15 pulsations. "Lozenge" skeleton blued steel hands. M. 13''', gilt brass,17 jewels, lever escapement, monometallic balance, self-compensating Breguet balance spring.Dial, case and movement signed.Diam. 33 mm.

Universal Genève, Tri-Compax, No. 1074650,Ref. 12551, circa 1945.Very fine, astronomic, 18K yellow gold gentleman's wristwatch with square button chronograph, registers, tachometer, triple date and moon phases.

C. two body, polished and brushed, triangular lugs.D. champagne with applied gold indexes and Arabic numerals, auxiliary dials for the seconds, the 12 hours and 30-minute registers, outer tachometer graduation, graduation for the days of the month, apertures for the days of the week, the months and the moon phases. "Feuille" gold hands. M. 14''', rhodium plated, 17 jewels, lever escapement, monometallic balance, self-compensating Breguet balance spring.Dial, case and movement signed.Diam. 36 mm.

Universal Genève, Tri-Compax, No. 1156206,Ref. 22279, circa 1945.Fine, astronomic, stainless steel, gentleman's wristwatch with square button chronograph, registers, tachometer, triple date and moon phases and extensible steel bracelet.

C. three body, polished and brushed, concave lugs, back with monogram. D. matt silver with radium-coated Arabic numerals, auxiliary dials for the seconds, the 12 hours and 30-minute registers, outer tachometer graduation, graduation for the days of the month, apertures for the days of the week, the months and the moon phases. "Lozenge" radium-coated skeleton hands. M. 14''', rhodium plated, 17 jewels, lever escapement, monometallic balance, self-compensating Breguet balance spring.Dial, case and movement signed.Diam. 34 mm.