No. 28120, Brotherhood of Railroad Trainmen Official Standard
17-jewel Grade 999 18-size, wheel pattern damascened full plate adjusted movement signed "BRT Standard, Ball & Co., Cleveland O.", 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, Ball Watch Co. Cleveland, O." with black arabic numerals, subsidiary seconds, blued hands, associated Jefferson 20-year open face case engraved with a dog
54mm