The Cyma Tavannes 766 watch movement is a mechanical movement option that includes an optional gold lever and an escape wheel. It features variations in bridge shapes, although the specific differences between the Cyma Tavannes 766, 202, 203, and 205 models are not known. The movement is manually wound and includes sub-second functionality. Additionally, there are both sweep seconds and non-sweep seconds variations available. The Cyma Tavannes 766 movement was commonly used around 1943.