The Bettlach 1601N watch movement features a ratchet on the dial side and a crown mechanism with a rocker bar. Variants with less than 15 jewels use metal bushings instead of jewels. The signature on the dial side often or always reads "100." This movement functions as a manual wind watch with a date setting that is changed between 21:50 and 24:00 hours. It also includes a calendar feature. The Bettlach 1601N movement was commonly used during the period around 1960.