AMERICAN WATCH CO. WALTHAM 18 SIZE ANTIQUE COIN SILVER KEY WIND POCKET WATCH: The case is a 4 oz coin silver with decorative engraving, the interior marked American Watch Co. Waltham Mass. The dial is also marked American Watch. Size 18, ''P.S. Bartlett movement 654675 serial number dates the watch to 1872. Key wind and key set, runs well. The dial does show a couple of hairlines, with no chips or missing material. Sold with the key.