Grand Seiko SLGB015
Ref. SLGB015 · In production
- Case37 mm
- Thick11.4 mm
- Lug-to-lug44.3 mm
- Water res.100 m
- MovementSpring Drive
- CrystalSapphire
Overview
The Grand Seiko SLGB015 is a sports watch from the Evolution 9 collection. It has a 37 mm case, 11.4 mm thick, 44.3 mm from lug to lug. Inside is a spring drive movement (calibre 9RB2) with 72 h of power reserve. You also get 100 m water resistance, a sapphire crystal and a bracelet.
Who it suits
- Wrists of roughly 14.9–16.6 cm (5.9–6.5 in), by our Watch Finder sizing guide
- Everyday wear including swimming
Strengths
- Sapphire crystal resists scratches
- 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: ±20 seconds per year (±3 seconds per month)
- Compact 44.3 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 | 37 mm | grand-seiko.com · 23 Oct 2026 |
|---|---|---|
| Thickness | 11.4 mm | grand-seiko.com · 23 Oct 2026 |
| Lug-to-lug | 44.3 mm | 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 |
| Water resistance | 100 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 | 148 g | grand-seiko.com · 23 Oct 2026 |
Dial
| Power-reserve indicator | Yes | grand-seiko.com · 23 Oct 2026 |
|---|
Movement
| Movement type | Spring Drive | grand-seiko.com · 23 Oct 2026 |
|---|---|---|
| Calibre | 9RB2 | 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 | ±20 seconds per year (±3 seconds per month) | 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) | $10,200 | grand-seiko.com · 23 Oct 2026 |
|---|---|---|
| Production status | In production | grand-seiko.com · 23 Oct 2026 |
| Style (our classification) | Sports | 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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Picked with Watch Finder's style tags and sizing.
Questions about the Grand Seiko SLGB015
How big is the Grand Seiko SLGB015?
The case is 37 mm wide, 11.4 mm thick and 44.3 mm from lug to lug.
What movement does the Grand Seiko SLGB015 use?
It uses the 9RB2 calibre, a spring drive movement with 72 h of power reserve.
Can I swim with the Grand Seiko SLGB015?
Yes. It is rated to 100 m.
How much is the Grand Seiko SLGB015?
The US list price was $10,200 on grand-seiko.com when we checked on 23 Oct 2026. Prices change, so check before you buy.
Will the Grand Seiko SLGB015 fit my wrist?
By our sizing guide it sits best on wrists of about 14.9–16.6 cm (5.9–6.5 in). Use the fit checker on this page to test your own wrist.
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