
Cam-actuated two-button chronograph. Displays hours and minutes with a central 60-second counter and a 3 o'clock 30-minute register (optional 15-minute register available as SW511 BH c). Includes quick-set date, ball-bearing self-winding, stop-seconds, 28,800 vph (4 Hz), 27 jewels, and a 62-hour power reserve.
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