Grand Seiko
Calibre 9S27
Automatic
Specifications
- Maker
- Grand Seiko
- Type
- Automatic
- In-house
- Yes
- Power reserve
- about 50 h
- Frequency
- Not found in sources
Sources
- Official Grand Seiko retrieved October 16, 2026
Used in
| Watch | Ø | Thickness | Lug-to-lug |
|---|---|---|---|
| Grand Seiko Heritage STGK009 STGK009G | 27.8 mm | 11.2 mm | 33.5 mm |
| Grand Seiko Heritage STGK031 STGK031G | 30 mm | 10.5 mm | 36.2 mm |