Serial number dating from this table is not a 100% accurate way to date the watches, but is generally accepted to be accurate within 6 to 12 months.
| YEAR | REF. | CAL. | MOVEMENT NUMBERS |
|---|---|---|---|
| 1957-1958 | 2915-1 | 321 | 15,499,XXX-15,997,XXX |
| 1958-1959 | 2915-2 | 321 | 15,996,XXX-16,648,XXX |
| 1959 | 2915-3 | 321 | 16,648,XXX-16,649,XXX |
| 1959-1960 | 2998-1 | 321 | 17,301,XXX-17,761,XXX |
| 1960 | 2998-2 | 321 | 17,302,XXX-17,761,XXX |
| 1960-1961 | 2998-3 | 321 | 17,761,XXX-17,765,XXX |
| 1961-1962 | 2998-4 | 321 | 17,762,XXX-18,419,XXX |
| 1962 | 2998-5 | 321 | 18,419,XXX-18,645,XXX |
| 1962 | 2998-6 | 321 | 18,419,XXX |
| to | 2998-61 | 321 | to |
| 1963 | 2998-62 | 321 | 19,584,XXX |
| 1962-1964 | 105.002-62 | 321 | 19,583,XXX-20,525,XXX |
| 1964-1965 | 105.003-63 | 321 | 20,251,XXX to |
| 1965-1966 | 105.003-64 | 321 | 22,825,XXX |
| 1966-1969 | 105.003-65 | 321 | 22,825,XXX-26,554,XXX |
| 1964 | 105.012-63 | 321 | 20,520,XXX-20,526,XXX |
| 1964-1966 | 105.012-64 | 321 | 20,527,XXX-22,825,XXX |
| 1966-1967 | 105.012-65 | 321 | 22,825,XXX-24,527,XXX |
| 1967-1968 | 105.012-66 | 321 | 24,533,XXX-25,448,XXX |
| 1967-1969 | 145.012-67 | 321 | 24,066,XXX to |
| 1968-1969 | 145.012-68 | 321 | 26,554,XXX |
| 1968-1969 | 145.022-68 | 861 | 26,555,XXX-27,719,XXX |
| 1969-1971 | 145.022-69 | 861 | 28,420,XXX-31,629,XXX |
| 1970-1974 | -69 SW/XI | 861 | 31,000,XXX-32,857,XXX |
| 1971-1974 | 145.022-71 | 861 | 31,323,XXX-32,859,XXX |
| 1975-1976 | 145.022-74 | 861 | 31,312,XXX-39,182,XXX |
| 1976-1979 | 145.022-76 | 861 | 37,873,XXX-39,946,XXX |
| 1979-1982 | 145.022-78 | 861 | 44,818,XXX-44,822,XXX |
| 1981-1988 | 145.022 | 861 | 44,121,XXX-48,240,XXX |
| 1988-1996 | 145.0022 | 861 | 48,240,XXX-48,343,XXX |
| 1996-1997 | 145.0022 | 861 | 48,339,XXX-48,385,XXX |
| 1997 | 345.0022 | 1861 | 48,355,XXX onwards |
