Grand Seiko
Calibre 4J51
Quartz
Specifications
- Maker
- Grand Seiko
- Type
- Quartz
- In-house
- Yes
- Power reserve
- Not found in sources
- Frequency
- Not found in sources
Sources
- Official Grand Seiko retrieved October 16, 2026
Used in
| Watch | Ø | Thickness | Lug-to-lug |
|---|---|---|---|
| Grand Seiko Heritage STGF387 STGF387G | 26 mm | 8.1 mm | 32.9 mm |