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 watch with a titanium (super titanium) case, finished with super-hard coating. It is priced above the $1,500 median across the guide. Nothing touching the skin is nickel-bearing steel, verified across the case, caseback and bracelet.

All Seiko watchesExotic-material other watchesTitaniumGMTUnder $5,000
Price
$2,300
Material
Titanium
Grade / type
Titanium (Super Titanium)
Water resistance
200 m
Type
Other
Case diameter
43.1 mm
Origin
Japan
Movement
GPS Solar
Caliber
Seiko 5X53
Power reserve
6 months
Complications
GMT, Worldtimer, Perpetual calendar
Colour
Grey
Surface treatment
Super-hard coating
Caseback
Titanium
Nickel-free
Yes
Bracelet / strap
Titanium
Crystal
Sapphire
Display back
No
Dial
Black
Dial colours
Black
Lume
LumiBrite
Availability
Offered
Status
Current
Not published
Reference, Thickness, Lug-to-lug, Weight, Hardness, Construction, Matching bracelet
High confidence Verified Aug 2026 Source: Seiko Spec checksGrade Jul 2026Price Aug 2026 medium
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Frequently asked questions

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

Yes. Nothing nickel-bearing touches the skin: a 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 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.

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