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
7 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 terms of performance. Grand Seiko has not only revised the materials used to make this movement, but also applied MEMS (Micro Electro Mechanical System) technology,… Read more »

6 years ago

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

4 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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[…] the T0 development. The announcement of the T0 appears to also be serving as marketing material for 9S65 and 9SA5 powered […]

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