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| Hampden (Dueber) Watch Company Production Dates by Serial Number |
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| 1877 - 59,000 |
1888 - 560,000 |
1899 - 1,255,000 |
1910 - 2,650,000 |
1921 - 3,700,000 |
| 1878 - 70,000 |
1889 - 640,000 |
1900 - 1,384,000 |
1911 - 2,700,000 |
1922 - 3,750,000 |
| 1879 - 100,000 |
1890 - 740,000 |
1901 - 1,512,000 |
1912 - 2,760,000 |
1923 - 3,800,000 |
| 1880 - 140,000 |
1891 - 805,000 |
1902 - 1,642,000 |
1913 - 2,850,000 |
1924 - 3,850,000 |
| 1881 - 180,000 |
1892 - 835,000 |
1903 - 1,768,000 |
1914 - 2,920,000 |
1925 - 3,900,000 |
| 1882 - 215,000 |
1893 - 835,000 |
1904 - 1,896,000 |
1915 - 3,000,000 |
1926 - 3,950,000 |
| 1883 - 250,000 |
1894 - 900,000 |
1905 - 2,024,000 |
1916 - 3,100,000 |
1927 - 3,980,000 |
| 1884 - 300,000 |
1895 - 930,000 |
1906 - 2,152,000 |
1917 - 3,240,000 |
|
| 1885 - 350,000 |
1896 - 970,000 |
1907 - 2,280,000 |
1918 - 3,390,000 |
|
| 1886 - 400,000 |
1897 - 1,000,000 |
1908 - 2,400,000 |
1919 - 3,500,000 |
|
| 1887 - 480,000 |
1898 - 1,120,000 |
1909 - 2,520,000 |
1920 - 3,600,000 |
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