| Production Year | Starting Serial | Ending Serial | Approx. Quantity | Notable Features | |----------------|----------------|---------------|------------------|------------------| | 1948 (late) | 150,000 | 153,000 | 3,000 | Early "slant" grip; bright blue finish | | 1949 | 153,001 | 167,500 | 14,500 | Parkerized finish begins; "Military" marked | | 1950 (early) | 167,501 | 173,000 | 5,500 | Last variation; 2-piece barrel |
– Although focused on later production, Spacek’s book contains 14 pages of new model charts and two pages of the most accurate serial‑number information available, drawn from the original serial number logs now held by the BATF. histandard model hd military serial numbers best
Towards the end of production, serial numbers moved into different formats. | Production Year | Starting Serial | Ending Serial | Approx