SW530 M MPC a

Manual-winding monopusher chronograph with date and second time zone. Utilizes a cam-actuated single push-button in the crown to track hours, minutes, small seconds at 9 o'clock, a central 60-second counter, and a 30-minute counter at 12 o'clock (optionally 15 minutes for SW531 M MPC a). Equipped with a center GMT/24-hour second time zone, quick-set date and GMT, manual winding, a stop-second device, 28,800 vibrations per hour (4 Hz), 21 jewels, and a 62-hour power reserve.