The Bettlach 8488-73 watch movement is a calibre that shares the same designation as several other variations. It features various bridge shapes, but the precise differences between the different versions, including 1, 10.5''', 2, 10.5''', 30, 31, 50, 65 old, 66 old, 70 old, 71 old, 73 old, 76 old, 78, 90, 91, 107, 108, 110, 112, are not known. In terms of functionality, the movement's features include manual wind, sub second, and sweep seconds. It was predominantly used during the approximate period of 1940.