|Screw case back
|Dual-curved sapphire crystal
|Anti-reflective coating on inner surface
|Diameter 40.0mm Lug-to-lug 47.0mm Thickness 12.2mm
|Three-fold clasp with push button release
|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 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.