[ 9R Spring Drive ]



The first Grand Seiko from the Micro Artist Studio – Spring Drive, with an eight-day power reserve

The 9R Spring Drive 8Days is driven by a Spring Drive, and the first Grand Seiko to be produced by the specialists in high quality watches at the Micro Artist Studio in Seiko’s facility in Shiojiri, near Nagano

It contains the new caliber 9R01 Spring Drive with an eight-day power reserve.

This is made possible by an innovative approach to the barrel which preserves power by controlling the mainspring. The existing Spring Drive caliber contains one barrel, but the caliber 9R01 has three that are linked together, extending the usage time given from each wind by over 250%.

The case material is rare platinum 950, a blend containing 95% platinum. The newly developed Zaratsu polishing technique has also been used on this model to give the case a sharply defined edge and exquisite finish never before seen on a platinum case.
The pure white dial has a glittering diamond-dust effect reminiscent of a winter morning in the Suwa region, near the studio, a unique composite finish that ensures high-visibility and glistens as it catches the light.


Case : Platinum 950
Glass : Box-shaped sapphire crystal
Coating : Anti-reflection coating on inner surface
Case size : Diameter 43.0mm×Thickness 13.2mm
The perimeter of bracelet : 195.0mm
Band : Crocodile
Movement : Caliber 9R01   
Driving system : Spring Drive
Power reserve : Approximately 192 hours
Accuracy : ±10 seconds per month
Clasp : Three-fold clasp with push button release
Water resistance : 10 bar
Magnetic resistance : 4800 A/m (60 gauss)
Weight : 168.0 g
Remarks : Screw see-through case back
Screw back