Grand Seiko SBGM247
Ref. SBGM247 · In production
- Case40.5 mm
- Thick14.4 mm
- Lug-to-lug48.6 mm
- Water res.200 m
- MovementAutomatic
- CrystalSapphire
Overview
The Grand Seiko SBGM247 is a gmt watch from the Sport collection. It has a 40.5 mm stainless steel case, 14.4 mm thick, 48.6 mm from lug to lug. Inside is a automatic movement (calibre 9S66) 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
Trade-offs
- Thick at 14.4 mm: harder to slide under a cuff
- Heavy at 180 g
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 | 14.4 mm | grand-seiko.com · 23 Oct 2026 |
| Lug-to-lug | 48.6 mm | grand-seiko.com · 23 Oct 2026 |
| Case material | Stainless steel | 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 | 180 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 |
Movement
| Movement type | Automatic | grand-seiko.com · 23 Oct 2026 |
|---|---|---|
| Calibre | 9S66 | 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 |
| 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) | $6,100 | 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 SBGM247
How big is the Grand Seiko SBGM247?
The case is 40.5 mm wide, 14.4 mm thick and 48.6 mm from lug to lug.
What movement does the Grand Seiko SBGM247 use?
It uses the 9S66 calibre, a automatic movement with 72 h of power reserve.
Can I swim with the Grand Seiko SBGM247?
Yes. It is rated to 200 m.
Does the Grand Seiko SBGM247 have a date?
Yes, it shows the date.
How much is the Grand Seiko SBGM247?
The US list price was $6,100 on grand-seiko.com when we checked on 23 Oct 2026. Prices change, so check before you buy.
Will the Grand Seiko SBGM247 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.
Watch.co is independent and not affiliated with any brand. Brand names are used only to identify products.