Seiko SSG021
Ref. SSG021 · In production
- Case44.6 mm
- Thick11.5 mm
- Water res.100 m
- MovementSolar (GPS/radio)
- CrystalSapphire
Overview
The Seiko SSG021 is a chronograph watch from the Coutura collection. It has a 44.6 mm stainless steel case, 11.5 mm thick. Inside is a solar (gps/radio) movement (calibre 8B92) with about 6 months (4,380 h) of power reserve. You also get 100 m water resistance, a sapphire crystal and a bracelet.
Who it suits
- Wrists of roughly 17.9–19.8 cm (7.1–7.8 in), by our Watch Finder sizing guide
- Everyday wear including swimming
- Frequent travellers who track two time zones
- Grab-and-go wear without winding or setting
Strengths
- Sapphire crystal resists scratches
- Solar charging with about 6 months (4,380 h) of reserve
Written by Watch.co from the published specs below. These are not owner reviews.
Full specifications
Case
| Case diameter | 44.6 mm | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Thickness | 11.5 mm | seikowatches.com · 23 Oct 2026 |
| Case material | Stainless steel | seikowatches.com · 23 Oct 2026 |
| Crystal | Sapphire | seikowatches.com · 23 Oct 2026 |
| Water resistance | 100 m | seikowatches.com · 23 Oct 2026 |
Dial
| Luminous material | LumiBrite | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| GMT / second time zone | Yes | seikowatches.com · 23 Oct 2026 |
| Chronograph | Yes | our classification |
Movement
| Movement type | Solar (GPS/radio) | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Calibre | 8B92 | seikowatches.com · 23 Oct 2026 |
| Made in-house | Yes | seikowatches.com · 23 Oct 2026 |
| Power reserve | about 6 months (4,380 h) | seikowatches.com · 23 Oct 2026 |
Strap / Bracelet
| Bracelet / strap | Bracelet | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Lug width | 12 mm | seikowatches.com · 23 Oct 2026 |
Other
| US list price (MSRP) | $750 | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Production status | In production | seikowatches.com · 23 Oct 2026 |
| Style (our classification) | Chronograph | 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 Coutura
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Questions about the Seiko SSG021
How big is the Seiko SSG021?
The case is 44.6 mm wide, 11.5 mm thick.
What movement does the Seiko SSG021 use?
It uses the 8B92 calibre, a solar (gps/radio) movement with about 6 months (4,380 h) of power reserve.
Can I swim with the Seiko SSG021?
Yes. It is rated to 100 m.
How much is the Seiko SSG021?
The US list price was $750 on seikowatches.com when we checked on 23 Oct 2026. Prices change, so check before you buy.
Will the Seiko SSG021 fit my wrist?
By our sizing guide it sits best on wrists of about 17.9–19.8 cm (7.1–7.8 in). Use the fit checker on this page to test your own wrist.
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