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Combining a GMT function with a bi-directional rotating bezel allows this sporty Spring Drive model to display three different time zones. The 44mm stainless steel case makes an impressive statement on the wrist, while the dial in deep green evokes the rugged ridgelines of the Hotaka Mountains and the vitality of nature during the area’s brief summer season. The watch is powered by the Spring Drive Calibre 9R66, an automatic movement equipped with a power reserve indicator and offering a power reserve of approximately 72 hours when fully wound.
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| Case Material: | Stainless Steel |
|---|---|
| Glass Material: | Dual Curved Sapphire Glass with Anti-Reflective Coating on the Inside |
| Case size: |
Diameter: 44mm Thickness: 14.7 mm Length: 50.8mm |
| Case Colour: | Silver & Black |
| Case Weight: | 186 |
| Band/Bracelet: | Bracelet - Stainless Steel |
| Band Colour: | Silver |
| Band Reference: | AA1B321J0 |
| Dial Colour: | Green |
| Hand Indicators: | Hour, Minute, Seconds, 24-Hour |
| Calendar Indicators: | Date |
| Dial Markers: | Batons |
| Crown: | Screw Down |
| Rotating Bezel: | Two Way |
| Calibre no.: | 9R66 Instructions |
|---|---|
| Movement Type: | Spring Drive - Powered By The Movement of the Wearer |
| Accuracy: | ±1 second per day / ±15 seconds per month (average) |
| Power Reserve: | 72 Hours Power Reserve |
| Display: | Analogue |
| Dual Time: | 24 Hour Hand Can Be Adjusted To Second Time Zone. Bezel Can Be Set To A Third Time Zone. |
|---|---|
| Water Resistance: | 200 Metres |
| Other details / Features: |
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This design captures the dynamic cliffs of the Hotaka Mountains that stretch across Shinshu, where Spring Drive watches are crafted. Formed by ancient volcanic activity that violently uplifted the land, the Hotaka Mountains have been shaped over time by wind and snow into a dramatic alpine landscape. The dial pattern reflects these majestic ridgelines, rendered in a deep, lustrous green that evokes the resilient vitality of nature. It captures the beauty of a brief summer in the Hotaka Mountains.
Rooted in the Grand Seiko Style, the grammar of design that imbues Grand Seiko watches with an unmistakable presence, the case has evolved to have a sporty yet refined character. It offers 20 bar water resistance, ensuring reliability even in tough environments. The two-way rotating bezel is fitted with an insert made of sapphire glass, known for its high scratch resistance and lustrous transparency. The layout, with white Lumibrite applied across the daytime hours, enhances intuitive readability and adds a distinctive visual identity.
With a power reserve of 72 hours and accuracy of ±15 seconds per month, this was the first Spring Drive movement to incorporate a GMT mechanism.
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