| Python Model | |
| Year | Serial Number |
| 1955 | 1 |
| 1956 | 300 |
| 1957 | 1650 |
| 1958 | 5550 |
| 1959 | 7050 |
| 1960 | 9100 |
| 1961 | 13100 |
| 1962 | 18800 |
| 1963 | 24800 |
| 1964 | 30800 |
| 1965 | 41400 |
| 1966 | 50500 |
| 1967 | 61000 |
| 1968 | 73800 |
| 1969 | 90000-99999 |
| 1969 | E1001 |
| 1970 | E6301 |
| 1971 | E21201 |
| 1972 | E38001 |
| 1973 | E53501 |
| 1974 | E61001 |
| 1975 | E83701-E99999 |
| 1975 | 01001E-15000E |
| 1976 | 15001E-48300E |
| 1977 | 48301E-86200E |
| 1978 | 86201E-99999E |
| 1978 | 01001N |
| 1978 | V01001 |