| Model | Serial Prefix/Range | Approx. Year | Key Feature | | :--- | :--- | :--- | :--- | | .44 Hand Ejector 1st | 1 – 500 | 1908 | Triple Lock | | M1917 | 1 – 50,000 | 1917 | WWI, lanyard ring | | Registered Magnum | Reg. 1 – 5000 | 1935–39 | Sight record card | | .44 Magnum Pre-29 | S 130,000 – S 166,999 | 1956 | "S" prefix, 4-screw | | Model 29-2 | N 200,000 – N 500,000 | 1970–75 | Pinned barrel | | Model 29-2 | N 700,000 – N 970,000 | 1979–82 | Last of the pinned | | Model 629 | N 900,000 – N 999,999 | 1979–82 | First stainless .44 | | Model 29-5 | BDP 0001 – BFA 9999 | 1991 | Full-lug barrel option |
: An "N" prefix followed by several digits (e.g., N100000 ). Breakdown by Year Range : 1969 – 1972 : N1 to N60000 1972 – 1974 : N100000 series 1974 – 1977 : N200000 to N400000 series 1978 – 1980 : N500000 series 1980 – 1983 : N600000 to N800000 series 4. The Three-Letter Prefix Era (1980 – Present) smith and wesson serial numbers n frame
: Shared chronological ranges. The first N-frame was the .44 Hand Ejector 1st Model (Triple Lock) introduced in 1907. 2. The "S" Serial Era (1946 – 1969) | Model | Serial Prefix/Range | Approx