Colt Model 1860 Army .44 Caliber
Serial Numbers by Year
| Year | Serial Number Start |
| 1860 | 1 |
| 1861 | 2000 |
| 1862 | 25000 |
| 1863 | 85000 |
| 1864 | 150000 |
| 1865 | 153000 |
| 1866 | 156000 |
| 1867 | 162000 |
| 1868 | 170000 |
| 1869 | 177000 |
| 1870 | 185000 |
| 1871 | 190000 |
| 1872 | 198000 |
| 1873 | 199000 to 200500 |