ALBERT H. POTTER & CO., GENEVA [ Albert H. Potter & Co.，日內瓦] | A RARE GOLD HUNTING CASED KEYLESS POCKET CHRONOMETER CIRCA 1885, NO. 85 [ 罕有黃金精密計時懷錶，年份約1885，編號85]
ALBERT H. POTTER & CO., GENEVA
[ Albert H. Potter & Co.，日內瓦]
A RARE GOLD HUNTING CASED KEYLESS POCKET CHRONOMETER
CIRCA 1885, NO. 85
• Movement: nickel movement with damascened plates and bridges, Potter's patented pivoted detent escapement and bridge layout, large free-sprung bi-metallic compensation balance, blued steel helical spring, barrel bridge signed Albert H. Potter & Co. Geneva and marked Pat. Oct. 11.75, the balance cock engraved Escapement Pat. Oct. 11.75, the main plate engraved Plate desn Pat. Jan. 4.76, train bridge numbered 85
• Dial: white enamel, Roman numerals, outer minute ring, large sunken subsidiary seconds, blued steel moon hands, signed Albert H. Potter & Co., Geneva
• Case: 18ct gold, engine-turned covers, polished band, snap-on glazed cuvette, gold pendant and bow, case back numbered 68709, 137
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Movement: running at time of cataloguing, Plates with tarnishing and some small spots and scratches.
Dial: with a couple of small scratches, small abrasion at the very edge of the dial by 6 o'clock.
Case: in good overall condition with good definition to engine-turning.
The lot is sold in the condition it is in at the time of sale. The online condition report is provided to assist you with assessing the condition of the lot and is for guidance purposes only. The images of the lot also form part of the online condition report for the lot provided by Sotheby's. Any reference to condition in the online condition report does not amount to a full description of condition. The online condition report may make reference to particular imperfections of the lot but you should note that the lot may have other faults not expressly referred to in the online condition report of the lot or shown in the online images of the lot (for example, the online condition report may not specify mechanical replacements or imperfections to the movement, case, dial, pendulum, separate base(s) or dome). Watches in water-resistant cases have been opened to examine movements but no warranties are made that the watches are currently water-resistant. The online condition report may not refer to all faults, restoration, alteration or adaptation because Sotheby's is not a professional conservator or restorer but rather the online condition report is a statement of subjective, qualified opinion genuinely held by Sotheby's (for example, information regarding colour, clarity and weight of gemstones are statements of opinion only and not statements of fact by Sotheby's). Please also note that we do not guarantee the authenticity of any individual component parts, such as wheels, hands, crowns, crystals, screws, bracelets and wrist bands, since subsequent repairs and restoration work may have resulted in the replacement of original parts. In addition, certain images of the lot provided online may not accurately reflect the actual condition of the lot (for example, the online images may represent colours and shades which are different to the lot's actual colour and shades). For these reasons, the online condition report is not an alternative to taking your own professional advice regarding the condition of the lot. Prospective buyers should also refer to the Buying at Auction guide which includes important notices concerning the type of property in this sale. In particular, please note it is the purchaser's responsibility to comply with any applicable import and export matters, particularly in relation to lots incorporating materials from endangered species. Please be advised that wristbands made of materials derived from endangered or otherwise protected species (i.e. alligator and crocodile) are not sold with the watches and are for display purposes only. We reserve the right to remove these bands prior to shipping. NOTWITHSTANDING THIS ONLINE CONDITION REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD "AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS (ONLINE ONLY).
Albert Potter is considered one of the finest American chronometer makers, and the present lot exemplifies his mechanical ingenuity. The watch features several of Potter's exceptional designs, such as his pivoted detent escapement, which contains a special arrangement for the spring in order to make the passing action as smooth as possible. His design for the balance, which he patented on 11 October 1875, sees a single pin set into the end of the escape wheel cock, providing banking for the detent. This makes an adjustment for locking unnecessary. This piece also showcases Potter's plate design, which allows the wearer to more easily set the train. He patented this design on January 4th, 1875.
Although not stamped with Potter's trademark, the case of the present lot typifies Potter's style. It was likely exported to America and cased there in order to avoid the high tariffs on Swiss-made gold cases imported into the United States.