The Titanium Field GuidePicks of the month

Seiko Astron GPS Solar Dual-Time Chronograph SSH175

The Seiko Astron GPS Solar Dual-Time Chronograph SSH175 is a 44.1 mm Super Titanium chronograph with a Seiko 5X83 solar quartz movement. The case is surface-hardened, which guards against the scuffs bare titanium picks up.

All Seiko watchesChronograph watchesLightest, rankedSolarWorldtimerPerpetual calendarGMT
Price
$3,100
Material
Titanium
Grade / type
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
Colour
Grey
Surface treatment
Super-hard coating
Finish technology
Surface hardening
Nickel-free
Unconfirmed (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, Hardness, Construction, Caseback, Matching bracelet
High confidence Verified Jul 2026 Source: Seiko
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Frequently asked questions

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

The maker confirms titanium but does not publish a grade. The maker calls the material Super Titanium.

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

The case is 44.1 mm across and 14.4 mm thick. It is water resistant to 100 m.

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

About 110 g on its bracelet.

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

It is in production, at a list price of $3,100.

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