Case Material : Stainless steel Glass Material : Dual-curved sapphire crystal Glass Coating : Anti-reflective coating on inner surface Case size : Diameter 40mm × Thickness 14mm The perimeter of Band : 193mm Clasp type : Three-fold clasp with push button release
Caliber no. : 9S86 Movement Type : Automatic with manual winding Power reserve : Approx. 55 hours Accuracy : +5 to -3 seconds per day (when static) / +8 to -1 seconds per day (normal usage accuracy)
Water resistance : 10 bar Magnetic resistance : Equipped Other details / Features :
- ・24-hour hand (dual time display function)
- ・37 jewels
- ・Calendar-linked time difference adjustment function
- ・Case back with lion emblem
- ・Date display
- ・LIMITED EDITION on the case back
- ・Screw case back
- ・Screw-down crown
- ・See-through case back
- ・Stop seconds hand function
The blue dial - which features a 'Mount Iwate pattern' showing the ridgelines of the magnificent mountain visible from the Shizukuishi Watch Studio where all Grand Seiko mechanical timepieces are made- expresses the beauty of winter mountain scenery emerging faintly through moonlight reflected on snow.
The exterior design is a modern take on the stunning 'Grand Seiko Style'-the embodiment of the Grand Seiko design philosophy which was first established for the 44GS in 1967-and features a distortion-free, wide mirror surface throughout. The words "Grand Seiko Boutique Limited Edition" are displayed proudly on the sapphire glass case back, which is marked with the Grand Seiko lion emblem.