The Universal Geneve 51 watch movement, used from 1972 onwards, shares some similarities with the 7802A but specific differences are unknown. Key features of the 7804A include an electronically controlled balance motor, a sweep second hand, a day function that can be quickset by repeated pushing of the crown with the 12-hour position at the bottom, supporting two languages. Furthermore, it presents a quickset date function that can be adjusted by repeatedly pushing the crown with the 12-hour position at the top. The movement also includes a hack feature.