The Alpina 943 watch movement is an open face calibre movement produced in 1918 with a total of 600 units. It features a bimetallic screw balance with 4 adjustment screws and a Breguet hairspring. The movement includes a two-part crown wheel with big bearings for the crown and ratchet wheel, as well as a barrel with Geneva stopwork. The movement shares similarities with the IWC 63 12''' movement but does not include a set pin. Its functions include stem wind and set, sub second, and it was used during the period of 1892-1919.