SW500 M a

Manual-winding cam-operated chronograph with two pushers, displaying hours, minutes, and small seconds at 9 o'clock. Features a central 60-second hand, a 30-minute (or optional 15-minute) counter at 12 o'clock, a 12-hour register at 6 o'clock, and quick-set day/date. Operates at 4 Hz with 21 jewels, a stop-second function, and a 63-hour power reserve.