Year Starting S.N. Prefix
1940 A
1941 B
1942 C
1943 D
1944 E
1945 F
1946 G
1947 H
1948 I
1949 J
1950 K
1951 L
1952 M
1953 N
1954 P
1955 R
1956 S
1957 T
1958 U
1959 V
1960 W
1961 X
1962 Y
1963 Z
1964 AA
1965 AB
1966 AC
1967 AD
1968 AE
1969 AF
1970 AG
1971 AH(Snap on forecap)
1972 AJ
1973 AL
1974 AM
1975 AN
1976 AP
1977 AR(Striker Mech. Intr.)
1978 AS
1979 AT
1980 AU
1981 AX
1982 AY
Thank you for the information JohnBT. I have my late Fathers LNIB Sportsman serial# R57XXX. Now at least I can say what year it was made as I pass it down in the family. It was the first firearm I ever fired as a young lad!
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