Colt Conversion KIt Serial Number Ship Dates
.22LR - .45ACP Colt Conversion Unit for M1911 & Government Model
Year | Approximate Serial Number |
1938 | U1 |
1939 | U400 |
1940 | U900 |
1941 | U1100 |
1942 | U1400 |
1943 | U1701-U1750 |
1946 | U2001-U2670* |
*Colt Conversion Unit's continued to be produced past this time but this is the last recorded serial numbered unit.
.45ACP - .22LR Colt Conversion Unit for the Service Model Ace
Year | Approximate Serial Number |
1938 | U1 |
1939 | U18 |
1940 | U61 |
1941 | U112 |