Grand Seiko SBGX355
Ref. SBGX355 · In production
- Case37 mm
- Thick10.6 mm
- Lug-to-lug44.6 mm
- Water res.100 m
- MovementQuartz
- CrystalSapphire
Overview
The Grand Seiko SBGX355 is a sports watch from the Heritage collection, part of the Annual Accuracy Quartz family. It has a 37 mm high-intensity titanium case, 10.6 mm thick, 44.6 mm from lug to lug. Inside is a quartz movement (calibre 9F62). You also get 100 m water resistance, a sapphire crystal and a bracelet.
Who it suits
- Wrists of roughly 15.0–16.6 cm (5.9–6.5 in), by our Watch Finder sizing guide
- Everyday wear including swimming
- Shirt cuffs and smarter dress codes
- Grab-and-go wear without winding or setting
Strengths
- Sapphire crystal resists scratches
- Rated accuracy: ±10 seconds per year
- Slim at 10.6 mm
- Compact 44.6 mm lug-to-lug suits smaller wrists
- Light at 80 g
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 | 10.6 mm | grand-seiko.com · 23 Oct 2026 |
| Lug-to-lug | 44.6 mm | grand-seiko.com · 23 Oct 2026 |
| Case material | High-intensity titanium | 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 | 100 m | grand-seiko.com · 23 Oct 2026 |
| Magnetic resistance | 4,800 A/m | grand-seiko.com · 23 Oct 2026 |
| Weight | 80 g | grand-seiko.com · 23 Oct 2026 |
Dial
| Date | Date | our classification |
|---|
Movement
| Movement type | Quartz | grand-seiko.com · 23 Oct 2026 |
|---|---|---|
| Calibre | 9F62 | grand-seiko.com · 23 Oct 2026 |
| Made in-house | Yes | grand-seiko.com · 23 Oct 2026 |
| Rated accuracy | ±10 seconds per year | 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
| US list price (MSRP) | $4,100 | 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.
More in Annual Accuracy Quartz
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Questions about the Grand Seiko SBGX355
How big is the Grand Seiko SBGX355?
The case is 37 mm wide, 10.6 mm thick and 44.6 mm from lug to lug.
What movement does the Grand Seiko SBGX355 use?
It uses the 9F62 calibre, a quartz movement.
Can I swim with the Grand Seiko SBGX355?
Yes. It is rated to 100 m.
Does the Grand Seiko SBGX355 have a date?
Yes, it shows the date.
How much is the Grand Seiko SBGX355?
The US list price was $4,100 on grand-seiko.com when we checked on 23 Oct 2026. Prices change, so check before you buy.
Will the Grand Seiko SBGX355 fit my wrist?
By our sizing guide it sits best on wrists of about 15.0–16.6 cm (5.9–6.5 in). Use the fit checker on this page to test your own wrist.
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