Seiko Caliber 9s66

Grand Seiko Caliber 9S66

Seiko Caliber 9s66

BrandSeiko
Caliber Number9S66
Movement TypeAutomatic
Jewels35
Power Reserve72 hours
Vibrations Per Hour28,800
HairspringSpron 610
Shock SystemDiashock
FeaturesGMT
Country of ManufactureJapan
Known ModelsSBGM031

The Seiko caliber 9S66 is an in-house movement 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.

Grand Seiko 9S66

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