The Dugena 719 watch movement, also known as FHF-ST or FHF, is a mechanical movement used in watches. The movement features manual winding, sweep seconds, and a calendar function. The date can be set by changing the time between 20:30 and 24:00. The movement was in use around 1975. However, further information on the differences between the 96-4N and 969-4N versions is not known.