The Felsa 4466 watch movement, likely manufactured in the 1970s, features an excenter self-winding mechanism with just one gear stage. The automatic module is assembled on a polycarbonate bridge and is mounted on a slightly modified manual-wind calibre. There may be variants of this movement with up to 25 jewels, as all bearings are equipped with metal bushings, and the escapement jewels are substituted with polished steel parts. Additionally, the movement includes functions such as automatic winding, a sweep second hand, and potentially other functions not elaborated upon.