Manufacturer details checked
Grand Seiko
Grand Seiko sbgm245g
- Exterior
- Stainless steel
- Case back
- 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
- Screw case back
- Glass Material
- Dual-curved sapphire crystal
- Glass Coating
- Anti-reflective coating on inner surface
- LumiBrite
- Lumibrite on hands and index(es)
- Case size
- Diameter 40.5mm Lug-to-lug 48.6mm Thickness 14.4mm
- Band width
- 20mm
- Clasp type
- Folding clasp with push button release
- The perimeter of Band
- 192mm
- Caliber no.
- 9S66 Instructions
- Movement Type
- Self-winding with manual-winding
- Power reserve
- Approx. 72 hours(3 days)
- Mean daily rate
- +5 to -3 seconds per day Mean daily rate is a mean value of daily rates in a condition where the movement before assembly in a case is measured in six positions in a fixed manner under artificially controlled environment for 12 days.
- Normal usage accuracy
- +10 to -1 seconds per day
- Water resistance
- 20 bar
- Magnetic resistance
- 4,800 A/m
- Weight
- 180 g
- Other details / Features
- Screw-down crown 35 jewels 24-hour hand (dual time display function) Calendar-linked time difference adjustment function
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
- sbgm245g
- 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.