A Spring Drive Powered 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 case and band are made with high-intensity titanium, providing a scratch and corrosion resistant finish with a 137g weight reduction,making it 30% lighter than stainless steel and a pleasure to wear.
The watch is water resistant to a depth of 200 meters and utilizes 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 Material : High-intensity titanium
Glass Material : Sapphire crystal
Glass Coating : Anti-reflective coating on inner surface
Lumi Brite : Lumibrite on hands and indexes
Case size : Diameter 44.2mm × Thickness 14mm
The perimeter of Band : 196mm
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 : ±1 second per day / ±15 seconds per month (average)
Water resistance : 200m / 660ft diver's
Magnetic resistance : Equipped
Weight : 137.0 g
Other details / Features :
・Case back with lion emblem
・Power reserve display
・Screw case back
・Stop second hand function
・Three-fold clasp with secure lock and extender
・Unidirectional rotating bezel