No. 28517, Brotherhood of Railroad Trainmen 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 "BRT Standard, Ball & Co. Cleveland, O." with black arabic numerals, subsidiary seconds, pierced Ball patent blued hands, associated Keystone 20-year open face case engraved with a locomotive
55mm