SW510 M MPC b

Hand-wound monopusher chronograph. Equipped with a cam-driven system operated by a single crown-mounted pusher, providing hours, minutes, small seconds at 9 o'clock, a central 60-second hand, and a 30-minute counter at 3 o'clock (or optional 15-minute counter). Features stop-second hacking, 28,800 vph (4 Hz) frequency, 23 jewels, and a 63-hour power reserve.