U.S. Watch Co. (Waltham, Mass) Grade 40 Production Charts

Note: Production dates are estimations but should be accurate within +/- 3 years.

Grade	Production	Runs	Lowest	Highest	Start	End	Profile Code/Image
40	450	6	90,601	95,500	1892	1893
	50	1	90,601	90,650	1892	1892	18s-M1888H-15j-HTL-APT-
	50		90,601	90,650	1892
	110	2	90,801	95,060	1892	1893	18s-M1888H-16j-HTL-APT-
	50		90,801	90,850	1892
	60		95,001	95,060	1893
	290	3	95,061	95,500	1893	1893	18s-M1888H-16j-HNL-APT-
	40		95,061	95,100	1893
	200		95,101	95,300	1893
	50		95,451	95,500	1893

Pocket Watch Database