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 second 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 also is marked with the Grand Seiko lion emblem.