YEAR Approximate Serial Number SN Range
1929 1-5850
1930 5350-10340
1931 9700-13670
1932 13600-14830
1933 14000-15200
1934 14400-17370
1935 16970-20020
1936 18900-24480
1937 22400-32140
1938 30720-34400
1939 33450-34450
1940 32200-36550
1941 36020-37730
1945 - 1946 32000-37835
1947 40001-56770
1948 56400-74050
1949 73350-78810
1950 78811-86400
1951 86370-95560
1952 95000-107450
1953 107000-112950
1954 112850-117779
1955 117780-120027
1956 120029-124780
1957 123950-129580
1958 129500-137200
1959 137000-150500
1960 148660-155300
1961 154500-159000
1962 158460-163200
1963 162270-167870
1964 167600-172000
1965 170850-177880
1966 177600-186580
1967 185850-192250
1968 191960-201360
1969 200870-202188
1969 CS001001-CS003200
1970 CS003000-CS005280
1971 202189-202388

Douglas G. Sheldon Colt's Super .38 - The Production History from 1929 through 1971 Willernie, MN 55090