Features
A Spring Drive GMT for the next generation
Equipped with a GMT hand, this watch features Grand Seiko’s unique Spring Drive calibre, which combines the motive force of a mainspring with the high precision of a quartz watch.
Housed in a water-resistant stainless steel case with ceramic bezel, a 24-hour GMT hand and Lumibrite indices for exceptional precision and legibility complemented by the smooth motion glide of Spring Drive.
Specifications
Exterior
| Exterior: | Stainless steel with ceramic bezel |
|---|---|
| Case back: | Screw case back |
| Glass Material: | Dual-curved sapphire crystal |
| Glass Coating: | Anti-reflective coating on inner surface |
| LumiBrite: | Lumibrite on hands and index(es) |
| Case size: | Diameter 40.5mm Lug-to-lug 48.7mm Thickness 14.7mm |
| Band width: | 20mm |
| Clasp type: | Three-fold clasp with push button release |
Movement
| Caliber no.: | 9R66 Instructions |
|---|---|
| Movement Type: | Spring Drive |
| Power reserve: | Approx. 72 hours(3 days) |
| Accuracy: | ±15 seconds per month (±1 second per day) |
Functions
| Water resistance: | 20 bar |
|---|---|
| Magnetic resistance: | 4,800 A/m |
| Weight: | 172 g |
| Other details / Features: |
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