SW500 M BV c

Featuring manual winding and cam-actuated chronograph functionality via two push-buttons, this caliber tracks hours, minutes, and central seconds. It includes a 30-minute counter at 12 o'clock (optionally 15 minutes), a 12-hour counter at 6 o'clock, a stop-second feature, 21 jewels, and a 63-hour power reserve at 28,800 vph.