South Bend Watch Serial Number List
| serial number | year | serial number | year |
| 380,501 | 1903 | 860,000 | 1917 |
| 390,000 | 1904 | 880,000 | 1918 |
| 405,000 | 1905 | 905,000 | 1919 |
| 425,000 | 1906 | 935,000 | 1920 |
| 460,000 | 1907 | 975,000 | 1921 |
| 500,000 | 1908 | 1,000,000 | 1922 |
| 550,000 | 1909 | 1,035,000 | 1923 |
| 600,000 | 1910 | 1,070,000 | 1924 |
| 660,000 | 1911 | 1,105,000 | 1925 |
| 715,000 | 1912 | 1,140,000 | 1926 |
| 765,000 | 1913 | 1,175,000 | 1927 |
| 800000 | 1914 | 1,210,000 | 1928 |
| 820,000 | 1915 | 1,240,000 | 1929 |
| 840,000 | 1916 | ------------ | ----- |
These are approximate production dates. Oftentimes, a block of serial numbers would be assigned and the movement plates blanked out; then the plates would be stored in the warehouse and finished as demand required. So, it is possible that a watch could have been completed some years after the serial number date.