
1. Manual winding
2. GMT setting
3. Time setting
Manual winding - monopusher chronograph - 2nd time zone
Cam operated chronograph - single push-button at 2 o'clock
Hours, minutes and small second at 9 o'clock
60 seconds counter in the center
30 minutes counter at 12 o'clock
Optional: 15 minutes counter at 12 o'clock (SW531 M MP b)
2nd time zone / 24 h GMT in the center
GMT with quick setting
Manual winding
Stop second device
28'800 vibrations per hour (4 Hz)
21 jewels
Typical power reserve: 63 hours