A textured blue dial evokes a moonlit birch tree in this manual-winding, 10-beat mechanical timepiece
Features
This 10-beat, manual-winding mechanical watch is based on the “Evolution 9 Style,” a unique design grammar that takes the fusion of Grand Seiko’s spirit with the aesthetic sensibilities of Japan to a higher level. Its textured, navy-colored dial evokes the bark of a white birch tree illuminated by the moon. Featuring a slender stainless steel case that is a mere 9.95mm thick, the creation has an appearance worthy of a Grand Seiko dress watch. The bezel is refined, with a narrow profile that complements the lugs, whose clean lines are echoed on the dial by the indexes. The manual-winding movement is the Caliber 9SA4, which features a high number of vibrations, 10 per second, to maintain a stable level of accuracy, as well as a generous power reserve of up to 80 hours.
Specifications
Exterior: | Stainless steel, Caseback: Stainless steel and sapphire crystal |
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Case back: | See-through case back |
Case back with 4 screws | |
Glass Material: | Box shaped sapphire crystal |
Glass Coating: | Anti-reflective coating on inner surface |
Case size: | Diameter 38.6mm Lug-to-lug 45.0mm Thickness 9.95mm |
Band width: | 20mm |
Band Material: | Cow leather |
Clasp type: | Three-fold clasp with push button release |
The perimeter of Band: | 195mm |
Caliber no.: | 9SA4 Instructions |
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Movement Type: | Manual winding |
Power reserve: | Approx. 80 hours |
Mean daily rate: |
+5 to -3 seconds per day
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Normal usage accuracy: | +8 to -1 seconds per day |
Water resistance: | Splash Resistant |
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Magnetic resistance: | 4,800 A/m |
Weight: | 74 g |
Other details / Features: |
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Dial reminiscent of a white birch appearing faintly in the moonlight
Upon the Hiraniwa Plateau in Iwate Prefecture, the same prefecture that is the home of the Grand Seiko Studio Shizukuishi, where Grand Seiko’s mechanical watches are manufactured, an impressive forest of white birch trees extends across a large area of roughly 1,000 acres. The dress watch’s dial is fashioned in a finely detailed design that expresses the beauty of the irregular patterns of tree bark. The color of the dial is navy, with a slight hint of fading, evoking the bark of a white birch bathed in moonlight.Strap that harmonizes with the dial in both texture and color
The strap features a beautiful, soft texture with small bumps and a color that blends with the dial to reinforce the image of a white birch illuminated by the moon.Caliber 9SA4
This movement is the result of Grand Seiko striving daily toward the goal of the ultimate in manual-winding timepieces. It features a high number of vibrations, 36,000 per hour, to maintain a stable level of accuracy, as well as a generous power reserve of up to 80 hours.Option strap

Strap
XGL00120
Band width: | 20mm |
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Clasp width: | 18mm |
Color: | Black |
Material: | Crocodile |
- Available at the Grand Seiko Boutiques and selected Grand Seiko Salons
Strap
XGL00320
Band width: | 20mm |
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Clasp width: | 18mm |
Color: | Brown |
Material: | Crocodile |
- Available at the Grand Seiko Boutiques and selected Grand Seiko Salons
Strap
XGL00520
Band width: | 20mm |
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Clasp width: | 18mm |
Color: | Navy |
Material: | Crocodile |
- Available at the Grand Seiko Boutiques and selected Grand Seiko Salons
Strap
XGL00720
Band width: | 20mm |
---|---|
Clasp width: | 18mm |
Color: | Light blue |
Material: | Crocodile |
- Available at the Grand Seiko Boutiques and selected Grand Seiko Salons
Strap
XGL00920
Band width: | 20mm |
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Clasp width: | 18mm |
Color: | Elegant light green |
Material: | Crocodile |
- Available at the Grand Seiko Boutiques and selected Grand Seiko Salons
Strap
XGL01120
Band width: | 20mm |
---|---|
Clasp width: | 18mm |
Color: | Warm orange |
Material: | Crocodile |
- Available at the Grand Seiko Boutiques and selected Grand Seiko Salons
Strap
XGL01320
Band width: | 20mm |
---|---|
Clasp width: | 18mm |
Color: | Light gray |
Material: | Crocodile |
- Available at the Grand Seiko Boutiques and selected Grand Seiko Salons