ALBERT H. POTTER & CO, 18K GOLD CHRONOMETER

ALBERT H. POTTER & CO.

Keyless-winding pocket watch, minute-repeater; 18K yellow gold Very fine and rare 18K yellow gold, hunting-case, keyless-winding, round-shaped, pocket watch, with subsidiary seconds at 6 and one horological complication: Minute-repeater on two steel gongs (activated by the slide at 6 o'clock) Cover engraved in taille-douce (fine cut) with the cypher "W. H. B.". Case-back engraved in taille-douce (fine cut) with a cypher. Inside the cover the mention "Dr. W. H. Buchtel / from his wife / Geneva, Aug. 15th 1888.". Glazed cuvette (dome). White enamel dial with radial Roman numerals; blued steel "Breguet" hands.

ALBERT H. POTTER & CO. KEYLESS-WINDING POCKET WATCH WITH MINUTE-REPEATER; 18K YELLOW GOLD

18K yellow gold, open-face “cut hunter”, keyless-winding, round-shaped, pocket watch, with subsidiary seconds at 6, minute-repeater on two steel gongs (activated by the slide at 6 o’clock). Case-back engraved in taille-douce (fine cut) with the cypher “G C M”. Inside the case-back a tintype (or melainotype or ferrotype) portrait a lady. Glazed cuvette (dome).

ALBERT H. POTTER ? WATCH WITH SIX COMPLICATIONS Albert H. Potter & Co., Genève, No. 327, circa 1885. Very fine and extremely rare, minute-repeating, 18K gold, hunting cased, keyless pocket watch with perpetual calendar and moon phases.

C. Three-body, "bassine et fi lets", polished. Glazed gold-rimmed cuvette to view the movement. D. White enamel with radial Roman numerals, outer minute track, subsidiary dials for week days, months of the leap year cycle, the date and seconds with inner moon-phase aperture. Blued-steel spade hands. M. 19"', nickel plated, 31 jewels, wolf?s tooth winding, part in screwed settings, counterpoised straight -line lever escapement, cut bimetallic compensation balance, Breguet balance spring with overcoil, repeating on gongs activated by a slide on the band. Dial, case and movement signed. Diam. 52.5 mm.

?Minute-Repeating? Albert H. Potter & Co. Geneva, No. 305, case No. 1305. Made circa 1890. Very fine and rare, hunting-cased, keyless, minute-repeating, 18K yellow gold pocket watch.

C. Three-body, "bassine", solid, polished. D. White enamel with radial Roman numerals, sunk subsidiary seconds dial. Blued steel "Breguet" hands. M. Cal. 43 mm. (19???), ?maillechort?, 29 jewels, some in screwed gold chatons, straight-line counterpoised lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, ?swanneck? micrometer regulator, repeating on gongs by activating slide on the band. Dial and movement signed, case numbered. Diam. 52 mm.

?Albert H. Potter Pocket Chronometer? Albert H. Potter & Co. Genève, No. 25. Made circa 1880. Exceptionally fine and very rare, 18K gold, hunting-cased, keyless pocket chronometer with counterpoised pivoted spring detent escapement.

C. Three-body, massive, "bassine et filets" engine-turned covers, gold-rimmed glazed cuvette. D. White enamel with radial Roman numerals, outer minute track, large subsidiary seconds. Blued steel Breguet hands. M. 45 mm (20'''), maillechort, patented caliber, "spotted" decoration, 22 jewels, most in gold screwed chatons, rocking bar keyless work, gold wheel train with five-arm crossings, patented pivoted detent escapement, counterpoised detent, gold passing spring, the exit pallet on the detent pivot, jewelled rollers, two-armed cut-bimetallic compensation balance with gold temperature adjustment screws and large platinum quarter screws, blued steel free-sprung helical balance spring with terminal curves, patented going barrel, lever hand-set. Dial and movement signed. Diam. 56 mm. Property of an Italian Gentleman

?Minute-Repeater? Albert H. Potter & Co. Geneva, No. 305. Made circa 1900. Very fine and rare, hunting-cased, keyless, minuterepeating, 18K yellow gold pocket watch.

C. Three-body, "bassine", solid, polished. D. White enamel with radial Roman numerals, sunk subsidiary seconds dial. Blued steel "Breguet" hands. M. Cal. 43 mm. (19???), maillechort, 29 jewels, some in screwed gold châtons, straight line counterpoised lever escapement, cut bimetallic compensation balance, blued steel Breguet balance-spring, ?swan-neck? micrometer regulator, repeating on gongs by activating slide on the band. Dial and movement. Diam. 52 mm.

Albert H. Potter & Co. Ge-neva, retailed by Bailey, Banks & Biddle, Philadelphia, No. 579. Made in the 1880s. Very fine, hunting-cased, keyless, 18K yellow gold pocket watch. Accompanied by a Bailey, Banks & Biddle box.

C. Four-body, "bassine et filets,? solid, polished, monogrammedcover, cuvette with photographic portrait of a young lady.D. White enamel with radial Roman numerals, outer minutering, subsidiary sunk seconds dial. Blued steel "Breguet" hands.M. Cal. 20''', ?AP?-shaped bridge caliber,nickel, ?fausses côtes? decoration, 21 jewels,straight line calibrated lever escapement, cut-bimetalliccompensation balance with gold screws, bluedsteel Breguet balance-spring.Dial and movement signed, case signed by the retailer.Diam. 53 mm.

Albert H. Potter & Co. Geneva, No. 336. Produced in 1888. Very fine and rare, hunting cased, keyless, minute repeating, 18K yellow gold pocket watch.

C. Three-body, "bassine", solid, polished, engraved dedication inside the cover, case back and cover with ornamental engravings.D. White enamel with painted radial Roman numerals, sunk subsidiary seconds dial. Blued steel "Breguet" hands. M. Cal. 43 mm (19???), rhodium-plated, 29 jewels, straight line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance-spring. Repeating on gongs through activating slide on the band.Dial, case and movement signed. Diam. 53 mm.

Albert H. Potter & Co. Geneva, No. 305, circa 1900. Very fine and 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. 43mm (19???), 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.

Albert H. Potter & Co, Geneva, No. 1, made circa 1887. Exceptional, highly important and unique 18K gold keyless watch with regulator dial, special winding/setting system, special plate construction and special single-tooth escape wheel lever escapement.

C. Four-piece, "bassine et filets", polished, the band incorporated into the movement, pendant of patented design, detachable glazed cuvette. D. White enamel, mounted by three feet secured by screws from the pillar plate, double sunk with small radial Roman hour chapter set at the top, central outer minute divisions with radial five-minute Arabic markers, subsidiary sunk seconds. Blued steel "lozenge" hands. M. 47.4 mm (21'''), nickel, unusual construction in which the pillar plate comprises a surrounding ring, circular decoration on the pillar plate, V-shaped bridge for the train mounted on one side by pins to the pillar plate ring decorated with spotting pattern, bridges for the escapement, going barrel with Maltese-cross stop work, 22 jewels in gold screwed settings, patented single-tooth-escape wheel lever escapement consisting of a small plate fitted on the pinion with a single ruby tooth, unusual cut bimetallic compensation balance with gold temperature screws and platinum quarer screws, blued steel Breguet balance spring, unusual keyless winding/setting mechanism with engagement setting mode by means of a vertical motion of the intermediate setting wheel bridge.Signed on dial, case and movement.Diam. 49 mm.

Albert H. Potter & Co. Geneva, No. 305. Produced circa 1882.Very fine and rare, hunting-cased, keyless, minute repeating, 18K gold pocket watch.

C. four-body, "bassine", massive, polished, detachable glazed cuvette. D. white enamel with Roman numerals, outer minute ring, auxiliary sunk seconds dial. "Breguet" blued steel hands. M. 43mm (20'''), nickel, 31 jewels, top ones in gold raised settings, straight line calibrated lever escapement, cut-bimetallic compensation balance, blued steel Breguet balance spring, "Swan-neck" micrometer regulator, repeating on gongs by activating slide in the band.Dial and movement signed.Diam. 52 mm.

Albert Potter & Co., Geneva, No. 486, circa 1880.Very rare, fine possibly unique, 18K gold, moon phase astronomical watch with unusual perpetual calendar.

C. Double body, massive, "bassine et filets", the engine-turned back engraved with the monogram "C.N.C.", gold, glazed, deta-chable cuvette. D. White enamel with Roman numerals, outer Arabic minute ring, moon phase aperture and sunk subsidiary seconds with inner perpetual calendar showing only the date, with the small hand automatically jumping from the last day of the month to the first of the next, whether it is a month of 28, 29, 30 or 31 days. Blued steel "spade" hands. M. 42.2 mm (18'''), glt brass, 18 jewels, straight line calibrated lever escapement, cut-bimetallic compensation balance with blued steel Breguet balance spring.Signed on the case and movement.Diam. 51 mm..

Albert H. Potter & Co., Geneva, No. 486, circa 1880.Very rare, fine and most interesting, 18K gold, moon phase astronomical watch with unusual perpetual calendar.

C. double body, massive, "bassine et filets", the engine-turned back engraved with the monogram "C.N.C.", gold, glazed, detachable cuvette. D. white enamel with Roman numerals, outer Arabic minute ring, moon phase aperture and sunk subsidiary seconds with inner perpetual calendar showing only the date, with the small hand automatically jumping from the last day of the month to the first of the next, whether it is a month of 28, 29, 30 or 31 days. Blued steel "Spade" hands. M. 42.2 mm (18'''), git brass, 18 jewels, straight line calibrated lever escapement, cut-bimetallic compensation balance with blued steel Breguet balance spring.Signed on the case and movementDiam. 51 mm.

Albert H. Potter & Co. Geneva, No. 4, made circa 1875.Exceptionally fine and rare, 18K gold, hunting cased, keyless pocket chronometer.

C. Four-body, massive, "bassine et filets" engine-turned covers, five-link hinges, gold glazed cuvette. D. White enamel with Roman numerals, outer minute ring, sunk subsidiary seconds, snap-on fit. Blued steel Breguet hands. M. 45 mm (20'''), nickel, patented caliber, "spotting" decoration, 22 jewels, most in gold screwed settings, patented pivoted detent escapement, counterpoised detent, gold passing spring, two-armed cut-bimetallic compensationbalance with gold temperature screws and large plainum quarter screws, blued steel free-sprung helical balance spring with terminal curves, patented motor barrel, lever-set.Signed on the dial and movement.Diam. 56 mm.

Albert H. Potter & Co., Geneva, No. 74, made circa 1880.Exceptionally fine and rare, 18K gold hunting-cased keyless pocket chronometer.

C. four-body, massive, "bassine et filets" polished, five-link hinges, gold glazed cuvette. D. white enamel with Roman numerals, outer minute ring, sunk subsidiary seconds, snap-on fit. Blued-steel Breguet hands. M. 45 mm (20'''), nickel, patented caliber, "fausses côtes" decoration, 22 jewels, most in gold screwed settings, patented pivoted detent escapement, counterpoised detent, gold passing spring, two-armed cut-bimetallic balance with gold temperature screws and large platinum quarter screw, blued steel free-sprung helical balance spring with terminal curves, patented motor barrel, lever-set.Signed on the dial and movement, case punched with Potter's trade mark registered on??.Diam. 56 mm.

Albert H. Potter & Co. Geneva, No. 744, made circa 1885.Exceptional and certainly unique, 18K gold, hunting-cased, keyless, constant force chronometer escapement watch with self-starting and automatic balance-locking features.

C. Four-body, "bassine et filets", solid, five-piece hinges, polished, double lift springs, gold glazed cuvette. D. White enamel, radial Roman numerals, outer minute ring, subsidiary sunk seconds, snap-on fit. Blued steel Breguet hands. M. 45,7 mm (20'''), nickel, "fausses côtes" and spotting decoration, 28 jewels, ingenious constant force escapement utilizing Potter's pivoted detent mechanism to wind and lock the spring-loaded pivoted impulse pawn, cut bimetallic compensation balance with goldemperature-adjusting screws and platinum screws for mean time adjustment, free-sprung blued steel helical balance spring, mechanism locking the balance when the watch is wound down, double barrel click, each with its own spring, the lever set with unusual self-loaded spring lever.Signed on dial and movement, case stamped with the same serial number.Diam. 54,6 mm.

Albert H. Potter & Co. Geneva, No. 9, made circa 1875.Exceptionally fine and rare 18K gold hunting cased keyless pocket chronometer.

C. Four-body, solid, "bassine et filets" polished, five-link hinges, gold glazed cuvette. D. White enamel with radial Roman numerals, outer minute ring, sunk subsidiary seconds, snap-on fit. Blued steel Breguet hands. M. 20''', nickel, patented caliber, "fausses côtes" decoration, 22 jewels, most in gold screwed settings, patented pivoted detent escapement, counterpoised detent with shock-absorbing loop acting on adjustable eccentric gold screw with ruby cylindrical insert, gold passing spring,wo-armed cut bimetallic balance with gold temperature screws and large platinum quarter screws, blued steel free-sprung helical balance spring with terminal curves, patented motor barrel, lever-set.Signed on the dial and movement, case punched with Potter's trademark.Diam. 56 mm.

Albert H. Potter & Co. Geneva, No. 41, made circa 1877.Very fine 18K gold, hunting-cased, keyless pocket chronometer.

C. Four-body, "bassine", solid, engine-turned cover, the front one with small central monogram, polished band, gold glazed cuvette, inside back cover a photographic portrait of a woman and a baby. D. White enamel, radial Roman numerals, outer minute ring, subsidiary sunk seconds. Blued steel Breguet hands. M. 44 mm (19 1/2'''), nickel, "fausses côtes" decoration on front and back plates, patented split-plate "kidney" caliber, going barrel, straight line calibrated lever escapement, cut bimetallicompensation balance with gold temperature-adjusting screws and platinum quarter screws, blued steel Breguet balance spring, 21 jewels, stem-set.Signed on dial and movement, case stamped with gold warranty mark used by Potter.Diam. 55 mm.

Albert H. Potter & Co. Geneva, No. 17, circa 1880.Very fine and rare 18K gold hunting-cased keyless pocket chronometer.

C. Three-body, massive, 'bassine et filets' engine-turned in barleycorn pattern. D. White enamel with Roman numerals and sunk subsidiary seconds, snap-on fit, blued-steel Breguet hands. M. 20 ???, nickel, patented caliber, 'fausses côtes' decoration, 22 jewels, most 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 withterminal curves.Signed on the dial, case and movement.Diam. 56 mm.