A Spring Drive Diver’s watch
This diver’s watch is powered by Grand Seiko’s unique Spring Drive caliber, which combines the motive force of a mainspring with the high precision of a quartz watch.
The watch is water resistant to a depth of 200 meters and utilizes Lumi Brite for increased visibility of the hands and index. Designed for use in some of the most unforgiving environments, the rotating bezel is removable for simple maintenance while the area around the crown has been crafted to ensure that residue from dirt, sand, or seawater can be easily washed off.
With a mirror-finished case achieved through Zaratsu polishing, a lustrous rotating bezel, and multi-faceted cut indices, this watch is unmistakably Grand Seiko in its appearance, high specifications and durability.
Case : Stainless steel Glass : Sapphire crystal Coating : Anti-reflection coating on inner surface Lumi Brite : Hand and index Case size : Diameter 44.2mm×Thickness 14.0mm
Movement : Caliber 9R65 Driving system : Spring Drive Power reserve : Approximately 72 hours Accuracy : ±1 per day (±15 seconds per month)
Clasp : Three-fold clasp with push button release Water resistance : Water resistance for air diving 200m Magnetic resistance : 4800 A/m (60 gauss) Weight : 201.0 g Remarks : ・Screw down crown
・Power reserve display function
The movement at the heart of Grand Seiko
Combining cutting-edge technology and time-tested craftsmanship as one of the world's true watch manufactures
Capturing and refining the very essence of a watch
A legacy of innovation beginning with the first Grand Seiko in 1960