The Wristwatch Field Guide

Seiko Astron GPS Solar (SSJ027)

SSJ027J1

The Seiko Astron GPS Solar (SSJ027) is a current-production other watch with a grey titanium (super-hard coated) case, finished with super-hard coating. It measures 41.2 mm across, 12 mm thick, 48.6 mm lug to lug, 110 g, and is water resistant to 100 m. Inside is the Seiko 3X62 gps solar movement, with 6 months (full charge) power reserve. Complications: Worldtimer, Perpetual calendar, Date. Priced from $2,200 (limited to 1,500). Brand origin: Japan.

Titanium and ceramic other watchesTitaniumUnder $5,000
Reference
SSJ027J1
Type
Other
Price
$2,200 · limited to 1,500
Case diameter
41.2 mm
Thickness
12 mm
Lug-to-lug
48.6 mm
Water resistance
100 m
Weight
110 g (with bracelet)
Origin
Japan
Movement
GPS Solar
Caliber
Seiko 3X62
Power reserve
6 months (full charge)
Complications
Worldtimer, Perpetual calendar, Date
Material
Titanium
Grade / type
Titanium (super-hard coated)
Colour
Grey
Hardness
Construction
Surface treatment
Super-hard coating
Caseback
Titanium
Nickel-free
Not verified (clasp or buckle material not confirmed)
Bracelet / strap
Integrated titanium bracelet
Matching bracelet
Standard
Crystal
Sapphire
Display back
No
Dial
Light blue (Starry Sky)
Lume
LumiBrite
Availability
Offered
Status
Limited edition of 1,500 (2024)
High confidence Verified Jun 2026 Source: Seiko (maker) / aBlogtoWatch Maker / listing ↗
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Frequently asked questions

What is the case material of the Seiko Astron GPS Solar (SSJ027)?

The Seiko Astron GPS Solar (SSJ027) has a grey titanium (super-hard coated) case with a titanium caseback. This is confirmed against the maker spec.

What size is the Seiko Astron GPS Solar (SSJ027)?

It is 41.2 mm in diameter, 12 mm thick, 48.6 mm lug to lug, and water resistant to 100 m.

How much does the Seiko Astron GPS Solar (SSJ027) weigh?

About 110 g (w/ bracelet).

How much does the Seiko Astron GPS Solar (SSJ027) cost, and is it available?

It is current-production and lists from $2,200.

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