| Approximate Serial Number Range | Estimated Year | |--------------------------------|----------------| | 1 – 10,000 | 1948–1949 | | 10,001 – 35,000 | 1950–1952 | | 35,001 – 70,000 | 1953–1955 | | 70,001 – 110,000 | 1956–1958 | | 110,001 – 140,000 | 1959–1960 | | 140,001 – 157,000 | 1961–1962 |
Locate a stamp like or “XY” on the barrel. The first letter is the month, the second is the year. remington model 721 serial number lookup
This document is for informational purposes. Always follow firearm safety rules. Firearm manufacturing dates do not guarantee condition or safety. Have any antique or vintage firearm inspected by a qualified gunsmith before use. | Approximate Serial Number Range | Estimated Year