Serial Number |
Year Manufactured |
1 |
1906 |
28,000 |
1935 |
41,509 |
1946 Sept. |
41,602 |
1947 Jan. |
44,398 |
1948 Jan. |
47,194 |
1949 Jan. |
49,990 |
1950 Jan. |
52,001 |
1950 June |
55,220 |
1951 June |
58,400 |
1952 June |
61,600 |
1953 June |
64,800 |
1954 June |
68,001 |
1955 June |
73,000 |
1956 June |
78,000 |
1957 June |
83,000 |
1958 June |
88,000 |
1959 June |
93,001 |
1960 June |
98,370 |
1961 Jan. |
109,110 |
1962 Jan. |
119,850 |
1963 Jan. |
130,551 |
1964 Jan. |
137,395 |
1965 Jan. |
144,239 |
1966 Jan. |
151,083 |
1967 Jan. |
157,927 |
1968 Jan. |
164,771 |
1969 Jan. |
171,617 |
1970 Jan. |
180,890 |
1971 Jan. |
190,168 |
1972 Jan. |
199,444 |
1973 Jan. |
208,720 |
1974 Jan. |
218,001 |
1975 Jan. |
230,645 |
1976 Jan. |
243,289 |
1977 Jan. |
255,933 |
1978 Jan. |
268,577 |
1979 Jan. |
281,221 |
1980 Jan. |
All years other than 1906, 1946, 1950, 1955, 1960, 1965, 1970, 1975, and 1980 are approximations. From 1983 onwards, you may calculate the date of manufacture by adding 50 to the two digit prefix of the serial number.