|Case back:||Screw case back|
|Glass Material:||Sapphire crystal|
|Glass Coating:||Anti-reflective coating on inner surface|
|Case size:||Diameter 40.0mm Lug-to-lug 46.8mm Thickness 10.0mm|
|Clasp type:||Three-fold clasp with push button release|
|The perimeter of Band:||205mm|
|Caliber no.:||9F82 Instructions|
|Accuracy:||±10 seconds per year|
|Water resistance:||10 bar|
|Magnetic resistance:||4,800 A/m|
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 Grand Seiko's expert watchmakers.
Spring Drive is a unique movement that delivers one-second-a-day precision, using just the power of a mainspring.