The Titanium Field Guide

Seiko Astron GPS Solar (SSJ027)

SSJ027J1 Archive · used only

The Seiko Astron GPS Solar (SSJ027) is a discontinued watch with a Titanium (super-hard coated) case, finished with super-hard coating. At 110 g it sits around the middle for watches in the guide, and is priced above the $1,899 median across the guide. It ships on a matching titanium bracelet rather than a strap. No longer offered new; listed here as an archive reference for the used market.

Titanium other watchesUnder $3,000Lightest, rankedOn a titanium braceletSolarWorldtimerPerpetual calendar
Price
$2,200
Titanium
Titanium (super-hard coated)
Weight
110 g (with bracelet)
Water resistance
100 m
Reference
SSJ027J1
Type
Other
Case diameter
41.2 mm
Thickness
12 mm
Lug-to-lug
48.6 mm
Origin
Japan
Movement
GPS Solar
Caliber
Seiko 3X62
Power reserve
6 months (full charge)
Complications
Worldtimer, Perpetual calendar, Date
Case shape
Round
Case colour
Natural / grey
Finish technology
Surface hardening
Surface treatment
Super-hard coating
Caseback
Titanium
Nickel-free
Not verified (clasp or buckle material not confirmed)
Bracelet / strap
Integrated titanium bracelet
Titanium bracelet
Standard
Crystal
Sapphire
Display back
No
Dial
Light blue (Starry Sky)
Dial colours
Blue
Lume
LumiBrite
Availability
No longer offered
Status
No longer offered (2024 limited edition of 1,500, sold out and removed from the Seiko lineup)
High confidence Verified Jul 2026 Source: Seiko (maker) / aBlogtoWatch Maker / listing ↗
Facts are free to cite with a link.
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Frequently asked questions

What grade of titanium is the Seiko Astron GPS Solar (SSJ027)?

The Seiko Astron GPS Solar (SSJ027) has a 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 no longer offered new; the guide keeps it as an archive reference for the used market, and it listed from $2,200 when current.

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