SW530 MP b

Cam-actuated monopusher chronograph operated by a single button at 2 o'clock. It displays hours, minutes, small seconds at 9 o'clock, a central 60-second counter, and a 30-minute counter at 12 o'clock (optional 15-minute version), plus a central 24-hour GMT hand with quick-set. The movement is self-winding with a ball bearing, includes a stop-second mechanism, 25 jewels, and provides a 62-hour power reserve at 28,800 vibrations per hour.