A Spring Drive Diver’s watch
This diver’s watch is powered by Grand Seiko’s unique Spring Drive calibre, 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 utilises LumiBrite 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 back:||Screw case back|
|Glass Material:||Sapphire crystal|
|Glass Coating:||Anti-reflective coating on inner surface|
|LumiBrite:||Lumibrite on hands and index(es)|
|Case size:||Diameter 44.2mm Lug-to-lug 51.0mm Thickness 14.0mm|
|Clasp type:||Three-fold clasp with secure lock & push button release, solid & slide adjuster|
|Caliber no.:||9R65 Instructions|
|Movement Type:||Spring Drive|
|Power reserve:||Approx. 72 hours(3 days)|
|Accuracy:||±15 seconds per month (±1 second per day)|
|Magnetic resistance:||4,800 A/m|
|Other details / Features:||
The three movements at the heart of Grand Seiko
One of the world's foremost mechanical movements, the culmination of high-precision micro-engineering and the attention to detail of Seiko's expert watchmakers.
Spring Drive is a unique movement that delivers one-second-a-day precision, using just the power of a mainspring.