You want the number on the bottom of the grip
the k would be in front of the numbers if that was a serial, you maybe looking at model or assembly number there.
- C Series:
C1 - C233,999………….....1948 – 52
C236,004 – C261,483…….1953
C277,555 - C402,923….…1954 – 56
C402,924 – C405,018…….1957
C405,019 – C429,740…....1958 – 59
C429,741 – C474,148…….1960
C474,149 – C622,699…….1961 – 62
C622,700 – C810,532…….1963 – 65
C810,533 – C999,999….....1966 – 67
Thanks. Supposedly they have moved all their research off site to some historical agency that requires quite a bit of hassle to get answers from.If you call Smith and Wesson and are willing to wait on hold for 30 minutes, they can tell you exactly what it means. Sorry, it’s not much help but it’s something