Gold Watch no. 579
18?? - Potter, Geneve
2005 - Antiquorum, 23 Mar 2005, est $4-6,000, sold $6,900, "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 minute ring, 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."
2012 - Christie's, 12 Nov 2012, est CHF4-8,000, sold CHF 8,125, "Albert Potter. An 18K gold hunter case keyless lever watch
Signed Albert Potter & Co., Geneva, retailed by Bailey, Banks & Biddle, Philadelphia, No. 579, circa 1885
Mechanical jewelled lever movement, Potter's unusual bridge design, gold cuvette with the photographic portrait of a young lady, white enamel dial Roman numerals, subsidiary seconds, circular plain case, enraved initials to the front, case signed and numbered by retailer, cuvette numbered, dial signed by maker, movement signed and numbered by maker
54 mm. diam. "
2013 - Dr Crott auction, 11 May 2013, est euro 12-15,000, "Albert H. Potter & Co., Geneva, Movement No. 579, Case No. 579, 54 mm, 143 g, circa 1880
A rare precision hunting case pocket watch with Potter's patented movement design - delivered to Bailey Banks & Biddle Co. Philadelphia - with original box
Case: 18k gold, monogrammed, tiered, polished, gold dome with ferrotypie. Dial: enamel, radial Roman numerals, auxiliary seconds, signed, blued Breguet hands. Movm.: specially designed bridge movement "AP", nickel-plated, "fausses côtes" decoration, screw compensation balance, counterpoised lever.
Ferrotype, also melainotype and tintype, is a photograph made by creating a direct positive on a sheet of iron metal that is blackened by painting, lacquering or enamelling and is used as a support for a collodion photographic emulsion.
Source: http://en.wikipedia.org/wiki/Tintype, as of 02/13/2013.