The IWC 854 watch movement is a mechanical calibre that was first introduced in 1942. It is specifically designed for ladies' watches and features a bidirectional rotor winding system. The design of the 380 movement is equivalent to the gents calibre Felsa 410, which was also produced in 1942. This movement is manual wind and shares similarities with the 381 model, although the specific differences are not known. The IWC 854 movement offers functions such as automatic winding and a sub-second display. It was widely used during the period starting from 1942.