The Eterna 1424UD is a mechanical watch movement introduced in 1952. It features an automatic winding system and a sweep second function. The movement utilizes a fixed stud carrier during its early production period, which later transitioned to a mobile stud carrier. Various rotor shapes were employed throughout its production duration. Notable functions include automatic winding and a sweep second hand. The Eterna 1424UD movement has been utilized from 1952 onwards.