Seiko SSH179
Ref. SSH179 · In production
- Case44.1 mm
- Thick14.4 mm
- Lug-to-lug50 mm
- Water res.100 m
- MovementSolar (GPS/radio)
- CrystalSapphire
Overview
The Seiko SSH179 is a gmt watch from the Astron collection. It has a 44.1 mm titanium case, 14.4 mm thick, 50 mm from lug to lug. Inside is a solar (gps/radio) movement (calibre 5X83) 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 17.7–19.6 cm (7.0–7.7 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
Trade-offs
- Thick at 14.4 mm: harder to slide under a cuff
- Long 50 mm lug-to-lug can overhang smaller wrists
Written by Watch.co from the published specs below. These are not owner reviews.
Full specifications
Case
| Case diameter | 44.1 mm | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Thickness | 14.4 mm | seikowatches.com · 23 Oct 2026 |
| Lug-to-lug | 50 mm | seikowatches.com · 23 Oct 2026 |
| Case material | Titanium | seikowatches.com · 23 Oct 2026 |
| Crystal | Sapphire | seikowatches.com · 23 Oct 2026 |
| Anti-reflective coating | Super-clear coating | seikowatches.com · 23 Oct 2026 |
| Caseback | Screw | seikowatches.com · 23 Oct 2026 |
| Water resistance | 100 m | seikowatches.com · 23 Oct 2026 |
| Magnetic resistance | 4,800 A/m | seikowatches.com · 23 Oct 2026 |
| Weight | 110 g | seikowatches.com · 23 Oct 2026 |
Dial
| Luminous material | LumiBrite | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Date | Date | our classification |
| GMT / second time zone | Yes | seikowatches.com · 23 Oct 2026 |
| Power-reserve indicator | Yes | seikowatches.com · 23 Oct 2026 |
Movement
| Movement type | Solar (GPS/radio) | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Calibre | 5X83 | 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 | 14 mm | seikowatches.com · 23 Oct 2026 |
Other
| US list price (MSRP) | $3,300 | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Production status | In production | seikowatches.com · 23 Oct 2026 |
| Style (our classification) | GMT | 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.
Variants with the same specs
Same case, movement and bracelet or strap; typically a different dial or finish.
More in Astron
Similar alternatives
Picked with Watch Finder's style tags and sizing.
Questions about the Seiko SSH179
How big is the Seiko SSH179?
The case is 44.1 mm wide, 14.4 mm thick and 50 mm from lug to lug.
What movement does the Seiko SSH179 use?
It uses the 5X83 calibre, a solar (gps/radio) movement with about 6 months (4,380 h) of power reserve.
Can I swim with the Seiko SSH179?
Yes. It is rated to 100 m.
Does the Seiko SSH179 have a date?
Yes, it shows the date.
How much is the Seiko SSH179?
The US list price was $3,300 on seikowatches.com when we checked on 23 Oct 2026. Prices change, so check before you buy.
Will the Seiko SSH179 fit my wrist?
By our sizing guide it sits best on wrists of about 17.7–19.6 cm (7.0–7.7 in). Use the fit checker on this page to test your own wrist.
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