The Titanium Field Guide

Seiko Astron GPS Solar (SSH157)

SSH157J1 Archive · used only

The Seiko Astron GPS Solar (SSH157) is a discontinued watch with a Titanium (super-hard coated) case, finished with super-hard coating; ceramic bezel. At 117 g it sits among the heavier watches in the guide, and is priced above the $1,899 median across the guide. Nothing touching the skin is nickel-bearing steel, verified across the case, caseback and bracelet. No longer offered new; listed here as an archive reference for the used market.

Titanium other watchesUnder $3,000Lightest, rankedOn a titanium braceletSolarWorldtimerPower reservePerpetual calendarGMTChronograph
Price
$2,500
Titanium
Titanium (super-hard coated)
Weight
117 g
Water resistance
100 m
Nickel-free
Yes
Reference
SSH157J1
Type
Other
Case diameter
43.3 mm
Thickness
13.4 mm
Lug-to-lug
49.5 mm
Origin
Japan
Movement
GPS Solar
Caliber
Seiko 5X83
Power reserve
6 months (full charge)
Complications
Chronograph, Worldtimer, GMT, Perpetual calendar, Power reserve, Date
Case shape
Round
Case colour
Natural / grey
Finish technology
Surface hardening
Surface treatment
Super-hard coating; ceramic bezel
Caseback
Titanium
Bracelet / strap
Titanium bracelet
Titanium bracelet
Standard
Crystal
Sapphire (dual-curved, super-clear coating)
Display back
No
Dial
Blue (Infinite Starry Sky)
Dial colours
Blue
Lume
LumiBrite
Availability
No longer offered
Status
No longer offered (2024 limited edition of 1,500, sold out and removed from the Seiko lineup)
High confidence Verified Jul 2026 Source: Seiko (maker) / aBlogtoWatch Maker / listing ↗
Facts are free to cite with a link.
Reader reviews & photosContribute photo or review
No reviews yet. Be the first to write one.
See it in the interactive guideGet new-watch alertsContribute a photo or review

Browse all titanium watch comparisons →

Similar titanium watches

Citizen Attesa Blue Universe Satellite Wave GPS F950 (CC4106-74E)CitizenAttesa Blue Universe Satellite Wave GPS F950 (CC4106-74E)$2,43744.0 mm13.7 mm thickOthersame category · same style · similar price · similar sizeCitizen Attesa Satellite Wave GPS F950 (Super Titanium)CitizenAttesa Satellite Wave GPS F950 (Super Titanium)$2,21044.6 mm111 gOthersame category · same style · similar price · similar sizeCitizen Attesa Black Titanium Eco-Drive GPS (Super Titanium, DLC)CitizenAttesa Black Titanium Eco-Drive GPS (Super Titanium, DLC)$2,21044.6 mm111 gOthersame category · same style · similar price · similar size
Porsche Design1919 Globetimer (Titanium)$2,35042.0 mm14.9 mm thickOthersame category · same style · similar price · similar sizeCitizen Attesa Satellite Wave GPS F950 2025 Limited (Super Titanium)CitizenAttesa Satellite Wave GPS F950 2025 Limited (Super Titanium)$2,58044.0 mm116 gOthersame category · same style · similar price · similar size
CitizenAttesa Satellite Wave GPS F950 Cosmic Blue (Super Titanium, Ti 50th)$2,90044.0 mm112 gOthersame category · same style · similar price · similar sizeMarch LA.B AM2 Slim GMT TitaneMarch LA.BAM2 Slim GMT Titane$2,51436.0 mm12.5 mm thick82 gOthersame category · same style · similar price · similar thickness
Grand SeikoSport Spring Drive GMT Lion's Mane SBGE307$11,50044.5 mm14.9 mm thick152 gOthersame category · same style · similar size · similar thickness

Alternatives to the Seiko Astron GPS Solar (SSH157)

Botta MONDO GMT (Tri-Titanium)BottaMONDO GMT (Tri-Titanium)$2,52045.0 mm9.5 mm thickOthersame category · same style · shared complications · similar priceAccutron Astronaut LTi (26B204A)AccutronAstronaut LTi (26B204A)$3,15041.0 mmOthersame category · same style · shared complications · similar priceCasio Oceanus Manta OCW-S7000-1ACasioOceanus Manta OCW-S7000-1A$1,30042.8 mm9.5 mm thick83 gOthersame category · same style · shared complications · similar priceWatch Angels CB01 TitanideWatch AngelsCB01 Titanide$2,86040.0 mm61 gOthersame category · same style · shared complications · similar priceSpaceOne Worldtimer TitaniumSpaceOneWorldtimer Titanium$2,90015.88 mm thickOthersame category · same style · shared complications · similar priceMing 22.01 GMTMing22.01 GMT$2,95038.0 mm10.7 mm thickOthersame category · same style · shared complications · similar price

More titanium watches from Seiko

Seiko Prospex Shogun Titanium (SPB191)SeikoProspex Shogun Titanium (SPB191)$1,20043.5 mm13.3 mm thick99 gDiver
SeikoProspex "Cave Diver" Shogun Titanium (SPB349)$1,50043.5 mmDiverSeiko Prospex SeikoProspex "Cave Diver" Shogun Titanium (SPB351)$1,50043.5 mmDiver
SeikoProspex "Cave Diver" Shogun Titanium (SPB357)$1,50043.0 mmDiverSeiko Prospex Marinemaster Professional 600m Titanium (SBDX067)SeikoProspex Marinemaster Professional 600m Titanium (SBDX067)$4,60045.4 mmDiverSeiko Prospex LX Line Spring Drive GMT Titanium (SNR035)SeikoProspex LX Line Spring Drive GMT Titanium (SNR035)$5,25044.8 mmOther

Frequently asked questions

Is the Seiko Astron GPS Solar (SSH157) nickel-free?

Yes. Nothing nickel-bearing touches the skin: a Titanium (super-hard coated) case with a titanium caseback, plus a non-steel crown and bracelet and clasp. The Titanium Field Guide marks it nickel-free for whole-watch skin contact. If your allergy is severe, confirm the contact points with the maker.

What grade of titanium is the Seiko Astron GPS Solar (SSH157)?

The Seiko Astron GPS Solar (SSH157) has a Titanium (super-hard coated) case with a titanium caseback. This is confirmed against the maker spec.

What size is the Seiko Astron GPS Solar (SSH157)?

It is 43.3 mm in diameter, 13.4 mm thick, 49.5 mm lug to lug, and water resistant to 100 m.

How much does the Seiko Astron GPS Solar (SSH157) weigh?

About 117 g.

How much does the Seiko Astron GPS Solar (SSH157) cost, and is it available?

It is no longer offered new; the guide keeps it as an archive reference for the used market, and it listed from $2,500 when current.

All titanium Seiko watches · Titanium other watches · All 1,175 watches

Learn: Titanium grades · Surface treatments · Why titanium scratches · How to read a spec

How we verify & grade · Image & Trademark Policy · Terms & Conditions