The Eterna 1425UD watch movement is a detached manual wind movement with an automatic feature. It also includes a sweep second function, as well as a day display with a curved design at the 6 o'clock position. The date can be set by changing the time between 20:30 and 24 hours. Additionally, the movement features an automatic winding mechanism and supports the simultaneous display of the day and date. This movement was commonly used around the year 1965.