The Fontainemelon 216 watch movement is a mechanical movement that was used in watches around the year 1930. It can be equipped with an optional bimetallic screw balance and has a variant with features such as a Breguet hairspring, separate stud carrier, and improved winding gear. The specific differences between the 814 and 816 models are unknown. The movement includes the functions of manual winding and a sub second display.