Grand Seiko Caliber 9S65


Caliber Number9S65 / 9S65A
Movement TypeAutomatic
Power Reserve72 hours
Vibrations Per Hour28,800
HairspringSpron 610
Shock SystemDiashock
FeaturesHours, minutes, central seconds, date
Country of ManufactureJapan
Known ModelsSBGR051

Seiko in-house caliber 9S65A found in a Grand Seiko automatic watch. This caliber was released in 2010 and is essentially an upgrade from GS cal. 9S55 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. The Spron 610 hairspring is anti-magnetic. This Grand Seiko movement is rated to be accurate within -3/+5 seconds/day.

Grand Seiko Caliber 9S65

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Jorge Robles
Jorge Robles
4 years ago

This Seiko caliber abandons the use of the “Magic Lever” as its automatic winding mechanism, using the more industry-standard of the reversing wheels. Here is a copy of the general description of this movement obtained from the official Seiko web site and quote: “Caliber 9S65 is the most standard automatic movement that typifies the 9S mechanical series. The old and new movements may appear to have a similar design, but they are utterly different in… Read more »

3 years ago

Can you help, what is the measurement for the second hand so i cam get the right size

2 years ago
Reply to  Alan

Dude this isn’t a cheap Seiko diver. You’d better sent it back to Grand Seiko for that!

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