Year of Production
This information provided to ISMACS courtesy Elna USA
Before 1963 the first digit in the serial number is the year of production.
| 1963 | A | |
| Star Series introduced | 1964 | B |
| 1965 | C | |
| 1966 | D | |
| 1967 | E | |
| 1968 | F | |
| 1969 | G or H | |
| 1970 | K | |
| 1971 | L | |
| New Model Star Series with Blue Case introduced | 1972 | M |
| 1973 | N | |
| 1974 | P | |
| 1975 | R | |
| 1976 | S | |
| 1977 | T | |
| Air Electronic introduced | 1978 | U |
| Stella/Elnita introduced | 1979 | V |
| 1980 | X | |
| 1981 | Y | |
| Carina/Elna 500 introduced | 1982 | Appears to be an upside-down "V" |
Week of production introduced in 1981. First two digits would indicate the week of production. Y32 at the beginning of the serial number would indicate the 32nd week of 1981.