Ball Watch Co., Cleveland, Ohio, a Hamilton 998 Elinvar "Official Standard", 16 size, 23 jewels, stem wind and lever set, adjusted to 5 positions and temperature, circular damascene nickel plate movement with lever escapement, monometallic balance with gold screws, gold jewel settings and whiplash micrometric regulator in a white gold filled, screw back and bezel, engraved, Ball Model open face case with stirrup bow, arabic numeral, single sunk white enamel dial with blued steel hands, serial #B649507

CASE: Numerous fine scratches on outer surface of case; Back with minor dings and marks; Fine scratches on inner surface of case; Band with minor brassing; Crystal with a few minor scratches; Crown shell worn through; Bow with minor wear and brassing. DIAL: Very good. HANDS: Replaced; Minute with minor oxide and loss to blue. MOVEMENT PLATES: Fine marks and scratches on plate, primarily on barrel bridge and balance cock; Crown wheel core with spot of oxide; Fine scratches at center of ratchet wheel; Click and regulator assembly with specks of oxide; Balance endstone setting with minor marring. MOVEMENT FUNCTION: Running order (winds, sets and ticks), circa 1940