Self-winding - chronograph
Cam operated chronograph - two push-buttons
Hours, minutes and small second at 9 o'clock
60 seconds counter in the center
30 minutes counter at 3 o'clock
Optional: 15 minutes counter at 3 o'clock (SW511 BH b)
Self-winding mechanism with ball bearing
Stop second device
28'800 vibrations per hour (4 Hz)
27 jewels
Typical power reserve: 62 hours
