Grand Seiko STGK023: caliber 9S27, 27.8 mm case, 100 m water resistance.
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Specifications
Specifications from Grand Seiko, last seen 2026-09-21.
Movement
- Caliber
- 9S27 All 9S27 watches →
- Movement
- Automatic
- Power reserve
- 50h
Case & crystal
- Case material
- Stainless steel
- Case diameter
- 27.8mm
- Case thickness
- 11.2mm
- Lug to lug
- 33.5mm
- Lug width
- 13mm
- Crystal
- Dual-curved sapphire crystal
Resistance
- Water resistance
- 100 m
- Magnetic resistance
- 4,800 A/m
Catalogue
- Family
- STGK
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Variants Same watch, different market or bracelet
| Reference | Edition | Region | Band | Clasp | Weight |
|---|---|---|---|---|---|
| STGK023G | G | — | — | Folding clasp with push button release | 75g |
