Gold Watch no. 57

Case: Gold Dial: White enamel regulator, subsidiary hours & seconds, signed "Albert H. Potter & Co., Geneve" Movement: Provenance: 18?? - Potter, Geneve 2008 - Christie's, 17 Nov 2008, est CHF5-8,000, sold CHF 23,750, "Albert Potter. A very fine and rare 18K gold openface keyless lever watch with regulator dial Signed Albert H. Potter & Co., Geneve, No. 57, circa 1885 Nickel-finished jewelled lever movement, Potter's unusual bridge design, bimetallic compensation balance, glazed dust cover, white enamel dial, outer Arabic 60 minutes indication with single central hand, two small subsidiary dials for Roman hours with single hand and constant seconds, circular case, engine-turned back, case, dial and movement signed 50 mm. diam. "