The Excelsior Park 4 is a manual-wind chronograph watch movement with functions including a 60-second, 30-minute, and 12-hour chronograph, sub second display, day indicator, date hand set by a pusher at 8 o'clock, and month indicator set by a pusher at 10 o'clock. The movement is equipped with a pillar wheel system for operating the chronograph. It was introduced around 1955 and is operated manually. These functions make the Excelsior Park 4 movement suitable for both chronograph and calendar applications in mechanical watches.