The Girard Perregaux 30 NEW is an open face calibre movement with a Breguet hairspring. It features a slightly modified train bridge that is specifically designed for Alpina watches. The only noticeable difference between the Alpina 215 and 245 movements is the difference in alignment-pin diameters. The Girard Perregaux 30 NEW movement offers stem winding and setting functionality, along with a sub-second display. This movement was commonly used during the approximate period of 1920.