The Bettlach 8481-73 watch movement is an open face calibre featuring a bimetallic screw balance and a Breguet hairspring. It incorporates a lever with an adjustable fork and a wormscrew regulator. The movement also includes a flying barrel with a Geneva stopwork and wolf-tooth winding wheels. Its functions comprise stem winding and setting, as well as sub-second display. The movement was utilized around the year 1914.