Grand Seiko
Calibre 9R15
Spring Drive, self-winding
Specifications
- Maker
- Grand Seiko
- Type
- Spring Drive, self-winding
- In-house
- Yes
- Power reserve
- about 72 h
- Frequency
- Not found in sources
Sources
- Official Grand Seiko retrieved October 16, 2026
Used in
| Watch | Ø | Thickness | Lug-to-lug |
|---|---|---|---|
| Grand Seiko Sport SBGA403 SBGA403G | 44.5 mm | 14.3 mm | 50 mm |