Trenton Watch Company New Jersey Age Determination by Movement Number
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| Year | S/N | Size | Model |
|---|---|---|---|
| 1887-1889 | 2001 - 61,000 | 18 | 1 |
| 1889 - 1891 | 64,001 - 135,000 | 18 | 2 |
| 1891 - 1898 | 135,001 - 201,000 | 18 | 3 |
| 1899 - ?? | 201,001 - 300,000 | 18 | 6 |
| 1891 - 1900 | 300,001 - 500,000 | 18 | 4 |
| 1892 - 1897 | 500,001 - 600,000 | 6 |
1 |
| 1894 - 1899 | 650,001 - 700,000 | 16 |
1 |
| 1898 - 1900 | 700,001 - 750,000 | 6 | 2 |
| 1900 - 1904 | 750,001 - 800,000 | 18 | 4 |
| 1896 - 1900 | 850,001 - 900,000 | 12 | 1 |
| 1898 - 1903 | 900,001 - 1,100,000 | 18 | 5 |
| 1902 - 1907 | 1,300,001 - 1,400,000 | 18 | 6 |
| 1900 - 1903 | 2,000,001 - 2,075,000 | 6 | 2 |
| 1902 - 1905 | 2,075,001 - 2,160,000 | 6 | 3 LS |
| 1905 - 1907 | 2,160,001 - 2,250,000 | 6 | 3 HP |
| 1899 - 1902 | 2,500,001 - 2,600,000 | 3/0 | 1 |
| 1905 - 1906? | 2,800,001 - 2,850,000 | 6 | 3 HP |
| 1900 - 1904 | 3,000,001 - 3,139,000 | 16 | 2 |
| 1903 - 1907 | 3,139,001 - 3,238,000 | 16 | 3 OF |
| 1903 - 1907 | 3,500,001 - 3,600,000 | 16 | 3 HC |
| 1905 - 1907 | 4,000,001 - 4,100,000 | 0 | 1 |
Source: pocketwatchrepair.com