The Langendorf 1337 watch movement is an open face calibre featuring a Breguet hairspring. The movement incorporates a ratchet on the dial side and a crown mechanism with a rocker bar. It further incorporates a swivel pinion, as per Edouard Heuer's patent from 1886. With a period of use spanning from 1908 to 1912, the Langendorf 1337 movement offers various functions, including a manual-wind chronograph with 60-second and 30-minute counters operated by a pillar wheel. It also allows for stem winding and pin setting, with an additional option of stem winding and setting. Moreover, the movement includes a sub-seconds display.