Grand Seiko SBGZ003
Ref. SBGZ003 · In production
- Case38.5 mm
- Thick9.8 mm
- Lug-to-lug43.7 mm
- MovementSpring Drive
- CrystalSapphire
Overview
The Grand Seiko SBGZ003 is an everyday watch from the Masterpiece collection. It has a 38.5 mm platinum case, 9.8 mm thick, 43.7 mm from lug to lug. Inside is a spring drive movement (calibre 9R02) with 84 h of power reserve. You also get a sapphire crystal and a bracelet.
Who it suits
- Wrists of roughly 15.3–17.2 cm (6.0–6.8 in), by our Watch Finder sizing guide
- Shirt cuffs and smarter dress codes
Strengths
- Sapphire crystal resists scratches
- 84 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)
- Slim at 9.8 mm
- Compact 43.7 mm lug-to-lug suits smaller wrists
- Display caseback shows the movement
Written by Watch.co from the published specs below. These are not owner reviews.
Full specifications
Case
| Case diameter | 38.5 mm | grand-seiko.com · 23 Oct 2026 |
|---|---|---|
| Thickness | 9.8 mm | grand-seiko.com · 23 Oct 2026 |
| Lug-to-lug | 43.7 mm | grand-seiko.com · 23 Oct 2026 |
| Case material | Platinum | 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 | Display (see-through) | grand-seiko.com · 23 Oct 2026 |
| Magnetic resistance | 4,800 A/m | grand-seiko.com · 23 Oct 2026 |
| Weight | 102 g | grand-seiko.com · 23 Oct 2026 |
Dial
| Date | No date | our classification |
|---|---|---|
| Power-reserve indicator | Yes | grand-seiko.com · 23 Oct 2026 |
Movement
| Movement type | Spring Drive | grand-seiko.com · 23 Oct 2026 |
|---|---|---|
| Calibre | 9R02 | grand-seiko.com · 23 Oct 2026 |
| Made in-house | Yes | grand-seiko.com · 23 Oct 2026 |
| Power reserve | 84 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 | 19 mm | grand-seiko.com · 23 Oct 2026 |
Other
| Production status | In production | grand-seiko.com · 23 Oct 2026 |
|---|---|---|
| Style (our classification) | Everyday | 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.
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Questions about the Grand Seiko SBGZ003
How big is the Grand Seiko SBGZ003?
The case is 38.5 mm wide, 9.8 mm thick and 43.7 mm from lug to lug.
What movement does the Grand Seiko SBGZ003 use?
It uses the 9R02 calibre, a spring drive movement with 84 h of power reserve.
Does the Grand Seiko SBGZ003 have a date?
No, it has no date display.
Will the Grand Seiko SBGZ003 fit my wrist?
By our sizing guide it sits best on wrists of about 15.3–17.2 cm (6.0–6.8 in). Use the fit checker on this page to test your own wrist.
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