Grand Seiko
Grand Seiko Grand Seiko Evolution 9 Spring Drive U.F.A. Ushio 300 Diver SLGB025
The Grand Seiko Grand Seiko Evolution 9 Spring Drive U.F.A. Ushio 300 Diver (reference SLGB025) is a 40.8 mm High-intensity titanium watch with a green dial. It runs on the spring Drive caliber 9RB1 with a 72-hour power reserve and is water resistant to 300 m.
Specifications
Case
- Reference
- SLGB025
- Collection
- Evolution 9
- Case size
- 40.8 mm
- Thickness
- 12.9 mm
- Case material
- High-intensity titanium
- Case shape
- Round
- Water resistance
- 300 m
- Bracelet / strap
- High-intensity titanium
Dial and bezel
- Dial
- Green
Movement
- Movement
- Spring Drive
- Caliber
- 9RB1
- Power reserve
- 72 hours
Production
- Production
- Current
Dial versions
This reference was made with these dials and finishes.
SLGB025 Green
Ushio
How it compares within the Evolution 9 family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| SLGB025 (This watch) | 40.8 mm | High-intensity titanium | Green | 9RB1 | — |
| SLGA015 | 43.8 mm | High-intensity titanium | Black (Kuroshio pattern) | 9RA5 | — |
| SLGA019 | 40 mm | High-intensity titanium | Blue (Lake Suwa pattern) | 9RA2 | — |
| SLGB003 | 37 mm | High-intensity titanium | Silvery white (ice forest pattern) | 9RB2 | — |
| SLGB023 | 40.8 mm | High-intensity titanium | Blue | 9RB1 | — |
| SLGC001 | 43.2 mm | High-intensity titanium | Blue | 9SC5 | 2023– |
| SLGC007 | 43.2 mm | Titanium | Icy blue | 9SC5 | 2025– |
| SLGH005 | 40 mm | Stainless steel | White (White Birch pattern) | 9SA5 | 2021– |
| SLGW003 | 38.6 mm | Brilliant Hard Titanium | White (birch pattern) | 9SA4 | — |
About the Evolution 9 family
Evolution 9 is the design language Grand Seiko introduced in 2020, alongside the high-beat caliber 9SA5, as a modern development of the Grand Seiko Style: a thinner bezel, wider hour and minute hands and a lower, more comfortable case. It became a collection in its own right and now covers mechanical, Spring Drive and chronograph models.
The catalog includes references with the 9SA4 and 9SA5 mechanical calibers, the 9RA2 and 9RA5 Spring Drive calibers and the 9RB family, in steel, Ever-Brilliant Steel, high-intensity titanium and platinum. Nature-themed dials such as the white birch texture are a large part of their appeal.
Quick answers
- What size is the Grand Seiko Grand Seiko Evolution 9 Spring Drive U.F.A. Ushio 300 Diver SLGB025?
- The Grand Seiko Grand Seiko Evolution 9 Spring Drive U.F.A. Ushio 300 Diver SLGB025 has a 40.8 mm case, 12.9 mm thick.
- What movement does the Grand Seiko Grand Seiko Evolution 9 Spring Drive U.F.A. Ushio 300 Diver SLGB025 use?
- It uses the spring drive caliber 9RB1, with a 72-hour power reserve.
- How water resistant is the Grand Seiko Grand Seiko Evolution 9 Spring Drive U.F.A. Ushio 300 Diver SLGB025?
- It is water resistant to 300 metres.
- Is the Grand Seiko Grand Seiko Evolution 9 Spring Drive U.F.A. Ushio 300 Diver SLGB025 still in production?
- Yes, it is a current reference.
- What is the Grand Seiko Grand Seiko Evolution 9 Spring Drive U.F.A. Ushio 300 Diver SLGB025 made of?
- The case is High-intensity titanium. Bracelet or strap: High-intensity titanium.
Catalog facts checked October 2026.