A substantial Victorian sterling silver open-face pocket watch by the American Waltham Watch Company, housed in a heavyweight English silver case hallmarked Birmingham 1891. 
A classic heavyweight 18-size timepiece from the golden railroad era. The American movement is encased in an authentic British silver export case stamped with the maker's mark of Alfred Bedford, the renowned manager of Waltham's London branch. Weighing an impressive 121.4 grams, it has a wonderfully solid, tactile presence in the hand. 
Specification:
Brand / Maker: American Waltham Watch Co. (A.W.W.Co.) 
Movement Model: Model 1883, 18-Size (Serial No. 5102610, dating to c. 1891) 
Movement Features: Gilt plate finish, safety pinion, subsidiary seconds 
Case Metal: Solid Sterling Silver (.925) 
Hallmarks: Stamped with English hallmarks for Birmingham, date letter 'r' (1891), and sponsor mark 'A.B' (Alfred Bedford) 
Dial: Original white enamel dial signed 'A.W.W.Co. Waltham, Mass.' with Roman numerals 
Total Weight: 121.4 grams gross 
Case Back: Traditional engine-turned engraving surrounding an unengraved central cartouche 
Condition Report:
Movement: Winding smoothly, running, and ticking strongly with good balance action. As with all antique mechanical horology, professional servicing is recommended for everyday precision timekeeping. 
Dial: Displays authentic age character with fine hairline crazing and a minor edge chip near the 12 o'clock marker (clearly photographed for inspection). Hands are original and legible. 
Case: Very good antique condition. Crisp engine-turning to the rear case, snug-fitting hinges, and firm bow. Shows honest light surface handling marks consistent with 135 years of age. 
Crystal: Original bevelled mineral glass crystal is intact, clear, and secure. 
Carefully packaged with heavy-duty shock protection and boxed for transit. Dispatched promptly via Royal Mail Tracked Delivery.