The Alpina 420 watch movement, utilized in timepieces from approximately 1960, is distinguished by its implementation of a pin-lever escapement mechanism. Additionally, it features an indirect minute hand friction clutch on the barrel, which is noteworthy for its simplicity and effectiveness. An innovative aspect of the Alpina 420 movement is the integration of a single part that replaces the setting-lever spring, yoke, and yoke spring. The early versions of this movement were also manufactured with a pointed staff. This movement offers a range of functions, including manual winding, sweep second, and date indication.