No. 8716, Official RR Standard, for F. F. Bonnet, Columbus.
17-jewel Grade 938 18-size, concentric damascened full plate adjusted movement signed "Official RR Standard, F. F. Bonnet, Columbus.", jewels in settings, bimetallic balance, overcoiled spring, swan's neck regulator with index on balance cock, stem wound, lever set, white enamel dial signed "Official RR Standard, F. F. Bonnet, Columbus." and "Ball's Standard Dial Pat. Apld. For." with black arabic numerals, subsidiary seconds, blued hands, engraved and monogrammed Ball Model Keystone 25-year swing out case
55mm