The Titanium 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 Titanium (Super Titanium) case, finished with super-hard coating. At 110 g it sits among the heavier chronograph watches in the guide, and is priced close to the $3,300 median for the category.

Titanium chronograph watchesLightest, rankedSolarWorldtimerPerpetual calendarGMT
Price
$3,100
Titanium
Titanium (Super Titanium)
Weight
110 g (with bracelet)
Water resistance
100 m
Type
Chronograph
Case diameter
44.1 mm
Thickness
14.4 mm
Origin
Japan
Movement
GPS Solar
Caliber
Seiko 5X83
Power reserve
6 months
Complications
Chronograph, GMT, Worldtimer, Perpetual calendar
Case shape
Round
Case colour
Natural / grey
Finish technology
Surface hardening
Surface treatment
Super-hard coating
Nickel-free
Not verified (contact-point materials not all confirmed)
Bracelet / strap
Titanium
Crystal
Sapphire
Display back
No
Dial
Black
Dial colours
Black
Lume
LumiBrite
Availability
Offered
Status
Current
Not published
Reference, Lug-to-lug, Caseback, Titanium bracelet Help verify
High confidence Verified Jul 2026 Source: Seiko Maker / listing ↗
Facts are free to cite with a link.
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Head to head: Astron GPS Solar Dual-Time Chronograph SSH175 vs Bulova Lunar Pilot Meteorite Super Titanium →

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

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Frequently asked questions

What grade of titanium is the Seiko Astron GPS Solar Dual-Time Chronograph SSH175?

The Seiko Astron GPS Solar Dual-Time Chronograph SSH175 has a 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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