The Fontainemelon 69-INT watch movement, used from 1964 onwards, features a manual wind mechanism, sweep second hand, and a date function that is adjusted by changing the 21-24h. In later samples, the setting lever is equipped with a pin instead of a screw, and the minute wheel also includes a pin. However, for older samples, these parts can still be utilized by removing the minute-wheel pin from the plate and using a modified setting-lever spring.