Grand Seiko
Calibre 9S66
Automatic
Specifications
- Maker
- Grand Seiko
- Type
- Automatic
- In-house
- Yes
- Power reserve
- about 72 h
- Frequency
- Not found in sources
Sources
- Official Grand Seiko retrieved October 14, 2026
- Official Grand Seiko retrieved October 14, 2026
Used in
| Watch | Ø | Thickness | Lug-to-lug |
|---|---|---|---|
| Grand Seiko Elegance SBGM221 GMT SBGM221G | 39.5 mm | 13.7 mm | 46.9 mm |
| Grand Seiko Sport SBGM247 GMT SBGM247G | 40.5 mm | 14.4 mm | 48.6 mm |