The Wristwatch Field Guide

Seiko Astron GPS Solar Dual-Time Chronograph SSH175

The Seiko Astron GPS Solar Dual-Time Chronograph SSH175 is a current-production chronograph watch with a grey titanium (super titanium) case, finished with super-hard coating. It measures 44.1 mm across, 14.4 mm thick, 110 g, and is water resistant to 100 m. Inside is the Seiko 5X83 gps solar movement, with 6 months power reserve. Complications: Chronograph, GMT, Worldtimer, Perpetual calendar. Priced from $3,100 (approx). Brand origin: Japan.

Titanium and ceramic chronograph watchesTitaniumGMTUnder $5,000
Reference
–
Type
Chronograph
Price
$3,100 · approx
Case diameter
44.1 mm
Thickness
14.4 mm
Lug-to-lug
–
Water resistance
100 m
Weight
110 g (with bracelet)
Origin
Japan
Movement
GPS Solar
Caliber
Seiko 5X83
Power reserve
6 months
Complications
Chronograph, GMT, Worldtimer, Perpetual calendar
Material
Titanium
Grade / type
Titanium (Super Titanium)
Colour
Grey
Hardness
–
Construction
–
Surface treatment
Super-hard coating
Caseback
–
Nickel-free
Not verified (contact-point materials not all confirmed)
Bracelet / strap
Titanium
Matching bracelet
–
Crystal
Sapphire
Display back
No
Dial
Black
Lume
LumiBrite
Availability
Offered
Status
Current
High confidence Verified Jun 2026 Source: Seiko Maker / listing ↗
Facts are free to cite with a link.
See it in the interactive guide

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Alternatives to the Seiko Astron GPS Solar Dual-Time Chronograph SSH175

CitizenAttesa Radio Chronograph Black DLC (Super Titanium)$1,19542.0 mm95 gChronographsame category · same style · shared complications · similar size
CitizenAttesa Platinum Shine Direct Flight (Super Titanium, Platinum DLC)$1,36042.0 mm95 gChronographsame category · same style · shared complications · similar size
Jaeger-LeCoultrePolaris Chronograph Worldtime (Titanium)$18,10044.0 mm12.5 mm thickChronographsame category · same style · shared complications · similar size
OmegaSpeedmaster HB-SIA Co-Axial GMT Chronograph–44.3 mmChronographsame category · same style · shared complications · similar sizeMicromilspec Pilot WorldtimerMicromilspecPilot Worldtimer$3,85042.0 mm15 mm thickPilotsame style · shared complications · similar price · similar size
U-BoatCapsoil Titanio Chronograph$2,90045.0 mmChronographsame category · shared complications · similar price · 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

What is the case material of the Seiko Astron GPS Solar Dual-Time Chronograph SSH175?

The Seiko Astron GPS Solar Dual-Time Chronograph SSH175 has a grey titanium (super titanium) case. This is confirmed against the maker spec.

What size is the Seiko Astron GPS Solar Dual-Time Chronograph SSH175?

It is 44.1 mm in diameter, 14.4 mm thick, and water resistant to 100 m.

How much does the Seiko Astron GPS Solar Dual-Time Chronograph SSH175 weigh?

About 110 g (w/ bracelet).

How much does the Seiko Astron GPS Solar Dual-Time Chronograph SSH175 cost, and is it available?

It is current-production and lists from $3,100.

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