The Baumgartner 866 watch movement, produced around 1940, is a manual wind movement with sub seconds and sweep seconds functions. It shares the same designation as other calibres, such as 1, 10.5''', 2, 10.5''', 30, 31, 50, 65 old, 70 old, 71 old, 73 old, 76 old, 78, 90, 91, 107, 108, 110, and 112. However, the exact differences between these calibres and the specific bridge shapes are currently unknown.