SW500 M BV a

Manual-winding cam-operated chronograph with dual pushers, showing hours and minutes. Equipped with a central 60-second timer, 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. Features a 4 Hz frequency, 21 jewels, stop-second capability, and a 63-hour power reserve.