Grand Seiko SBGE257
Ref. SBGE257 · In production
- Case40.5 mm
- Thick14.7 mm
- Lug-to-lug48.7 mm
- Water res.200 m
- MovementSpring Drive
- CrystalSapphire
Overview
The Grand Seiko SBGE257 is a gmt watch from the Sport collection. It has a 40.5 mm ceramic case, 14.7 mm thick, 48.7 mm from lug to lug. Inside is a spring drive movement (calibre 9R66) with 72 h of power reserve. You also get 200 m water resistance, a sapphire crystal and a bracelet.
Who it suits
- Wrists of roughly 16.4–18.1 cm (6.5–7.1 in), by our Watch Finder sizing guide
- Swimming, snorkelling and diving
- Frequent travellers who track two time zones
Strengths
- Sapphire crystal resists scratches
- 200 m water resistance
- Screw-down crown helps keep water out
- 72 h power reserve survives a weekend off the wrist
- Spring Drive: a smooth-gliding seconds hand and high accuracy
- Rated accuracy: ±15 seconds per month (±1 second per day)
Trade-offs
- Thick at 14.7 mm: harder to slide under a cuff
Written by Watch.co from the published specs below. These are not owner reviews.
Full specifications
Case
| Case diameter | 40.5 mm | grand-seiko.com · 23 Oct 2026 |
|---|---|---|
| Thickness | 14.7 mm | grand-seiko.com · 23 Oct 2026 |
| Lug-to-lug | 48.7 mm | grand-seiko.com · 23 Oct 2026 |
| Case material | Ceramic | grand-seiko.com · 23 Oct 2026 |
| Crystal | Sapphire | grand-seiko.com · 23 Oct 2026 |
| Anti-reflective coating | Anti-reflective coating on inner surface | grand-seiko.com · 23 Oct 2026 |
| Caseback | Screw | grand-seiko.com · 23 Oct 2026 |
| Water resistance | 200 m | grand-seiko.com · 23 Oct 2026 |
| Screw-down crown | Yes | grand-seiko.com · 23 Oct 2026 |
| Magnetic resistance | 4,800 A/m | grand-seiko.com · 23 Oct 2026 |
| Weight | 172 g | grand-seiko.com · 23 Oct 2026 |
Dial
| Luminous material | LumiBrite | grand-seiko.com · 23 Oct 2026 |
|---|---|---|
| Date | Date | our classification |
| GMT / second time zone | Yes | grand-seiko.com · 23 Oct 2026 |
| Power-reserve indicator | Yes | grand-seiko.com · 23 Oct 2026 |
Movement
| Movement type | Spring Drive | grand-seiko.com · 23 Oct 2026 |
|---|---|---|
| Calibre | 9R66 | grand-seiko.com · 23 Oct 2026 |
| Made in-house | Yes | grand-seiko.com · 23 Oct 2026 |
| Power reserve | 72 h | grand-seiko.com · 23 Oct 2026 |
| Rated accuracy | ±15 seconds per month (±1 second per day) | grand-seiko.com · 23 Oct 2026 |
| Hand-winding | Yes | grand-seiko.com · 23 Oct 2026 |
Strap / Bracelet
| Bracelet / strap | Bracelet | grand-seiko.com · 23 Oct 2026 |
|---|---|---|
| Lug width | 20 mm | grand-seiko.com · 23 Oct 2026 |
Other
| US list price (MSRP) | $6,900 | grand-seiko.com · 23 Oct 2026 |
|---|---|---|
| Production status | In production | grand-seiko.com · 23 Oct 2026 |
| Style (our classification) | GMT | our classification |
Specs are summarised in our own words from the brand's product page. Each row links its source and the date we checked it. Fields we haven't verified are left out rather than guessed.
Variants with the same specs
Same case, movement and bracelet or strap; typically a different dial or finish.
More in Sport
Similar alternatives
Picked with Watch Finder's style tags and sizing.
Questions about the Grand Seiko SBGE257
How big is the Grand Seiko SBGE257?
The case is 40.5 mm wide, 14.7 mm thick and 48.7 mm from lug to lug.
What movement does the Grand Seiko SBGE257 use?
It uses the 9R66 calibre, a spring drive movement with 72 h of power reserve.
Can I swim with the Grand Seiko SBGE257?
Yes. It is rated to 200 m.
Does the Grand Seiko SBGE257 have a date?
Yes, it shows the date.
How much is the Grand Seiko SBGE257?
The US list price was $6,900 on grand-seiko.com when we checked on 23 Oct 2026. Prices change, so check before you buy.
Will the Grand Seiko SBGE257 fit my wrist?
By our sizing guide it sits best on wrists of about 16.4–18.1 cm (6.5–7.1 in). Use the fit checker on this page to test your own wrist.
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