The Felsa 780 watch movement features a combination of settings for the escapement wheel and a indirectly driven minute that allows for a large balance. This movement is a joint venture of various watch brands, including Doxa, Ebel, Eberhard, Favre-Leuba, Girard-Perregaux, Juvenia, and Zodiac. The calibres Felsa 4035 and 4036 are mentioned as equivalent according to Bestfit, but their true producer remains uncertain as they are not found in any other register. The movement functions include a manual wind backwinder, backwind, and was primarily used around the year 1960.