Grand Seiko SBGH343
Ref. SBGH343 · In production
- Case38 mm
- Thick12.9 mm
- Lug-to-lug44.7 mm
- Water res.100 m
- MovementAutomatic
- CrystalSapphire
Overview
The Grand Seiko SBGH343 is a sports watch from the Heritage collection, part of the 62GS Mechanical Hi-Beat 36000 family. It has a 38 mm high-intensity titanium case, 12.9 mm thick, 44.7 mm from lug to lug. Inside is a automatic movement (calibre 9S85) with 55 h of power reserve. You also get 100 m water resistance, a sapphire crystal and a bracelet.
Who it suits
- Wrists of roughly 15.1–17.0 cm (5.9–6.7 in), by our Watch Finder sizing guide
- Everyday wear including swimming
- People who enjoy seeing a mechanical movement at work
Strengths
- Sapphire crystal resists scratches
- Screw-down crown helps keep water out
- Compact 44.7 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 mm | grand-seiko.com · 23 Oct 2026 |
|---|---|---|
| Thickness | 12.9 mm | grand-seiko.com · 23 Oct 2026 |
| Lug-to-lug | 44.7 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 | 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 | 98 g | grand-seiko.com · 23 Oct 2026 |
Dial
| Date | Date | our classification |
|---|
Movement
| Movement type | Automatic | grand-seiko.com · 23 Oct 2026 |
|---|---|---|
| Calibre | 9S85 | grand-seiko.com · 23 Oct 2026 |
| Made in-house | Yes | grand-seiko.com · 23 Oct 2026 |
| Power reserve | 55 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) | $7,900 | 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 62GS Mechanical Hi-Beat 36000
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Picked with Watch Finder's style tags and sizing.
Questions about the Grand Seiko SBGH343
How big is the Grand Seiko SBGH343?
The case is 38 mm wide, 12.9 mm thick and 44.7 mm from lug to lug.
What movement does the Grand Seiko SBGH343 use?
It uses the 9S85 calibre, a automatic movement with 55 h of power reserve.
Can I swim with the Grand Seiko SBGH343?
Yes. It is rated to 100 m.
Does the Grand Seiko SBGH343 have a date?
Yes, it shows the date.
How much is the Grand Seiko SBGH343?
The US list price was $7,900 on grand-seiko.com when we checked on 23 Oct 2026. Prices change, so check before you buy.
Will the Grand Seiko SBGH343 fit my wrist?
By our sizing guide it sits best on wrists of about 15.1–17.0 cm (5.9–6.7 in). Use the fit checker on this page to test your own wrist.
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