The Wristwatch Field Guide

Seiko Astron GPS Solar Dual-Time Sport SSH117

The Seiko Astron GPS Solar Dual-Time Sport SSH117 is a current-production other watch with a grey titanium (super titanium) case, finished with super-hard coating. It measures 43.1 mm across, and is water resistant to 200 m. Inside is the Seiko 5X53 gps solar movement, with 6 months power reserve. Complications: GMT, Worldtimer, Perpetual calendar. Priced from $2,300 (approx). Brand origin: Japan.

Titanium and ceramic other watchesTitaniumGMTUnder $5,000
Reference
–
Type
Other
Price
$2,300 · approx
Case diameter
43.1 mm
Thickness
–
Lug-to-lug
–
Water resistance
200 m
Weight
–
Origin
Japan
Movement
GPS Solar
Caliber
Seiko 5X53
Power reserve
6 months
Complications
GMT, Worldtimer, Perpetual calendar
Material
Titanium
Grade / type
Titanium (Super Titanium)
Colour
Grey
Hardness
–
Construction
–
Surface treatment
Super-hard coating
Caseback
Titanium
Nickel-free
Yes
Bracelet / strap
Titanium
Matching bracelet
–
Crystal
Sapphire
Display back
No
Dial
Black
Lume
LumiBrite
Availability
Offered
Status
Current
High confidence Verified Jul 2026 Source: Seiko Maker / listing ↗
Facts are free to cite with a link.
See it in the interactive guide

Similar titanium and ceramic watches

CitizenAttesa Satellite Wave GPS F950 (Super Titanium)$2,21044.6 mm111 gOthersame category · same style · similar price · similar size
CitizenAttesa Black Titanium Eco-Drive GPS (Super Titanium, DLC)$2,21044.6 mm111 gOthersame category · same style · similar price · similar size
CitizenAttesa Satellite Wave GPS F950 2025 Limited (Super Titanium)$2,58044.0 mm116 gOthersame category · same style · similar price · similar sizeCasio Oceanus Manta OCW-S7000-1ACasioOceanus Manta OCW-S7000-1A$1,30042.8 mm9.5 mm thick83 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 size
Porsche Design1919 Globetimer (Titanium)$2,35042.0 mm14.9 mm thickOthersame category · same style · similar price · similar sizeBotta MONDO GMT (Tri-Titanium)BottaMONDO GMT (Tri-Titanium)$2,52045.0 mm9.5 mm thickOthersame category · same style · similar price · similar sizeCasio Oceanus Manta OCW-S5000-1ACasioOceanus Manta OCW-S5000-1A$81042.3 mm9.5 mm thick82 gOthersame category · same style · similar size · same movement

Alternatives to the Seiko Astron GPS Solar Dual-Time Sport SSH117

March LA.B AM2 Slim GMT TitaneMarch LA.BAM2 Slim GMT Titane$2,51436.0 mm12.5 mm thick82 gOthersame category · same style · shared complications · similar priceWatch Angels CB01 TitanideWatch AngelsCB01 Titanide$2,86040.0 mm61 gOthersame category · same style · shared complications · similar price
CitizenAttesa Tsuki-Yomi A-T (Super Titanium)$87543.0 mm105 gOthersame category · same style · shared complications · similar size
KRONOSTIAtlas GMT$20941.0 mm13 mm thickOthersame category · same style · shared complications · similar sizeBreitling Aerospace B70 Orbiter (titanium)BreitlingAerospace B70 Orbiter (titanium)$4,60043.0 mm12.95 mm thick109 gOthersame category · same style · shared complications · similar size
OmegaSeamaster Aqua Terra 150M Worldtimer (Titanium)$10,40043.0 mm93 gOthersame category · same style · shared complications · similar size

More titanium and ceramic watches from Seiko

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

Frequently asked questions

Is the Seiko Astron GPS Solar Dual-Time Sport SSH117 nickel-free?

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

What is the case material of the Seiko Astron GPS Solar Dual-Time Sport SSH117?

The Seiko Astron GPS Solar Dual-Time Sport SSH117 has a grey titanium (super titanium) case with a titanium caseback. This is confirmed against the maker spec.

What size is the Seiko Astron GPS Solar Dual-Time Sport SSH117?

It is 43.1 mm in diameter, and water resistant to 200 m.

How much does the Seiko Astron GPS Solar Dual-Time Sport SSH117 cost, and is it available?

It is current-production and lists from $2,300.

All titanium and ceramic Seiko watches · Titanium and ceramic other watches · All 1040 watches

Learn: Titanium vs Ceramic · Ceramized Titanium