The Eterna 1470K watch movement is an automatic movement with two roller freewheels and a ball-bearing rotor. It features a worm screw regulation gear and is based on the manual wind calibre AS 1687/1688. The automatic mechanism was jointly developed by Doxa, Eberhard, Favre-Leuba, Girard-Perregaux, and Zodiac. The 42.2 movement shares similarities with the 42.3, although specific differences are unknown. The functions of the movement include automatic winding, a sweep second hand, a date feature that can be set by changing 20:40-24h, and a hack feature. This movement was primarily used around 1965.