The Venus 159 is a mechanical watch movement that was produced in significant numbers between 1937 and 1970, with over 3.5 million units manufactured. It featured various chrono mechanisms and occasionally utilized interchangeable parts from different calibres, such as the larger pillar plate from the Landeron 51. The movement provides a range of functions, including a manual-wind chronograph with a 60-second recording capability, along with sub-second and 30/45-minute chronograph features.