E. Howard & Co / Boston Altersbestimmung nach Werknummer 1858 - 1930 - Sammler-Uhren

E. Howard & Co / Boston Age determination by work number 1858 - 1930

E. Howard & Co.:
Boston, MA
1858-1903

serial number year
1-2,000 1858
2,500 1859
50,000 1860
73,000 1870
200,000 1875
300,000 1880
430,000 1885
600,000 1890
700,000 1895
812,000 1900
854,000 1903

E. Howard Watch Co. (Keystone):
Boston, MA
1902-1930

serial number year
850,000 1902
900,000 1903
980,000 1909
1,100,000 1912
1,285,000 1915
1,340,000 1917
1,400,000 1921
1,500,000 1930
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