No. B604102, Official RR Standard
23-jewel Ball Model 999 16-size, concentric damascened divided ¾ plate movement adjusted to 5 positions, inset gilt" RR" medallion, signed "Ball Watch Co., Cleveland O.", jewels in settings, double roller escapement, 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, Keystone 10K gold filled Ball Model open face case with stirrup bow
51mm