The IWC 37524 watch movement features a self-winding gear made from beryllium bronze. It employs springless pawl wheels with hook-levers, utilizing two levers and 15 teeth. These pawl wheels offer efficiency equivalent to a ratchet wheel with 60 teeth but are more robust due to larger teeth and the absence of pressure from a click spring. Additionally, the levers are adjustable to compensate for wear over time. The movement provides automatic winding and sweep seconds functionalities, along with a date feature that can be set by adjusting the 21-24-hour position. This movement was used around the period of 1960.