Hamilton Watch Co.,
No. B601757, Official RR Standard, with Delong's escapement
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, Delong escapement with upright pallets, 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, plain Wadsworth 10K gold filled open face case
49mm