Pocket Watch Database
E. Howard Watch Co. (Keystone) Series 0 Production Charts
Note: Production dates are estimations but should be accurate within +/- 3 years.
[1903,1904,1905,1906,1907,1908,1909,1910,1911,1912,1913,1914,1915,1916]
[850,0,0,0,200,1800,1300,3400,2500,500,3500,0,1200,1500]