The Baumgartner 421 watch movement, which was used during the period of 1940-1952, features a manual wind mechanism and incorporates a sub-second function. The movement prominently mimics balance screws, achieving a nearly perfect imitation and employs a steel impulse pin and -pallets if equipped with four jewels. Additionally, it incorporates a ratchet on the dial side and a crown mechanism with a rocker bar.