Manufacturer details checked
Grand Seiko
Grand Seiko sbga491g
- Exterior
- Stainless steel
- Case back
- See-through & Screw case back
- Glass Material
- Dual-curved sapphire crystal
- Glass Coating
- Anti-reflective coating on inner surface
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Specifications checked against the linked manufacturer page. The image source and display method are identified with the illustration.
Manufacturer specifications checked for this reference
These specifications were checked against the manufacturer page for this exact reference.
- Exterior
- Stainless steel
- Case back
- See-through & Screw case back
- Glass Material
- Dual-curved sapphire crystal
- Glass Coating
- Anti-reflective coating on inner surface
- Case size
- Diameter 40.0mm Lug-to-lug 46.2mm Thickness 12.5mm
- Band width
- 19mm
- Clasp type
- Folding clasp with push button release
- Caliber no.
- 9R65 Instructions
- Movement Type
- Spring Drive Self-winding with Manual-winding
- Power reserve
- Approx. 72 hours(3 days)
- Accuracy
- ±15 seconds per month (±1 second per day)
- Water resistance
- 10 bar
- Magnetic resistance
- 4,800 A/m
- Other details / Features
- Screw-down crown 30 jewels Power reserve indicator
Checked 2026-09-27 · Regional scope: manufacturer Europe · Manufacturer specifications; individual watches may vary.
Original manufacturer wording is retained for source data without a reviewed translation.
Recorded discovery details.
- Brand
- Grand Seiko
- Reference token
- sbga491g
- Collection candidate
- Not established
- Family candidate
- Not established
- Product type
- Watch candidate
Official discovery source
The exact token was retained from a stored official manufacturer URL or feed. The source supports discovery, but does not by itself verify every model detail.
Open official manufacturer page ↗Source record: grand-seiko-official-batch-20260924 · Manufacturer details checked; editorial publication pending.