The ETA 1306 watch movement is an automatic mechanism 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. Developed in collaboration with Doxa, Eberhard, Favre-Leuba, Girard-Perregaux, and Zodiac, the 32A movement was used during the period of 1965-1969. It includes functions such as sweep seconds, date setting by changing 20:40-24h, and a calendar. Differences between the 32A and 32.7 are not known.