Grand Seiko Caliber 9S66
|Power Reserve||72 hours|
|Vibrations Per Hour||28,800|
|Country of Manufacture||Japan|
Seiko in-house caliber 9S66 found in a Grand Seiko GMT Limited Edition. This caliber is essentially an upgrade from GS cal. 9S56 which offered a lower 48 hr power reserve. The 9S66 found in the limited edition GMT has a blue titanium/tungsten rotor featuring a Grand Seiko lion crest.
- Read more: Official 9S66 operating instructions from Seiko
- Grand Seiko GMT Anniversary Limited Edition Review