Grand Seiko Evolution 9 Collection Ushio 300 SLGB025
$16,300.00
Grand Seiko Evolution 9 Collection Spring Drive U.F.A. Ushio 300 Diver SLGB025G
In 2025, Grand Seiko unveiled the Spring Drive Caliber 9RB2, a groundbreaking movement that received the then-new U.F.A. designation, standing for “Ultra Fine Accuracy.” Boasting an annual accuracy rate of ±20 seconds, Caliber 9RB2 earned the distinction of being the most accurate wristwatch movement powered by a mainspring.* This model is powered by Caliber 9RB1, featuring an improved construction that makes it ideal for sporting conditions while sharing the same attributes as the Caliber 9RB2.
The term ushio, which means “tide” in Japanese, evokes the waters that surround the Japanese archipelago. The green dial draws from the tranquil beauty of shallow coastal waters near the shore.
Specifications
Exterior
| Exterior: | High-intensity titanium |
|---|---|
| Case back: | Screw case back |
| Glass Material: | Sapphire crystal |
| Glass Coating: | Anti-reflective coating on inner surface |
| LumiBrite: | LumiBrite on hands, index(es) and bezel |
| Case size: | Diameter 40.8mm Lug-to-lug 48.5mm Thickness 12.9mm |
| Band width: | 21mm |
| Clasp type: | Locking extension clasp with micro-adjustment |
Movement
| Caliber no.: | 9RB1 Instructions |
|---|---|
| Movement Type: | Spring Drive |
| Power reserve: | Approx. 72 hours(3 days) |
| Accuracy: | ±20 seconds per year (±3 seconds per month) |
Functions
| Water resistance: | 300m / 1000ft diver's |
|---|---|
| Magnetic resistance: | 4,800 A/m |
| Other details / Features: |
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