Calibre
Grand Seiko 9R31
In 6 watches by Grand Seiko
- Kind
- Spring Drive
- Power reserve
- 72 hours
- Jewels
- 30
- Watches from
- 2026
Watches that use it
Other Grand Seiko calibres
- Grand Seiko 9R6532 watches
- Grand Seiko 9S8527 watches
- Grand Seiko 9S8621 watches
- Grand Seiko 9R6616 watches
- Grand Seiko 9S6413 watches
- Grand Seiko 9S2710 watches
- Grand Seiko 9SA510 watches
- Grand Seiko 9F629 watches
- Grand Seiko 9F828 watches
- Grand Seiko 9R868 watches
- Grand Seiko 9S688 watches
- Grand Seiko 9RB27 watches