Introduced in 1954, calibre AS 1475 was a double barrel hand-wound movement beating at 18,000 A/h. Over one million such movements were produced. In 1956, Cal. AS 1568 was introduced, adding a date display. These calibres were replaced in 1970 with up-rated 21,600 A/h versions, AS 1930 and AS 1931, without and with date, respectively.