The Titanium Field Guide

Seiko Astron GPS Solar Dual-Time Chronograph (5X63)

HAB001

The Seiko Astron GPS Solar Dual-Time Chronograph (5X63) is a current-production chronograph watch with a Titanium (super-hard coating) case, finished with super-hard coating. It is priced under the $3,300 median for the category. It ships on a matching titanium bracelet rather than a strap.

Titanium chronograph watchesUnder $3,000On a titanium braceletSolarGMT
Price
$2,700
Titanium
Titanium (super-hard coating)
Water resistance
100 m
Reference
HAB001
Type
Chronograph
Case diameter
43.4 mm
Thickness
12.4 mm
Origin
Japan
Movement
GPS solar quartz chronograph
Caliber
5X63
Power reserve
6 months (full charge)
Complications
Chronograph, GMT, Date
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
Semi-integrated titanium three-link bracelet (HAB003 on silicone strap)
Titanium bracelet
Standard
Crystal
Sapphire
Display back
No
Dial
Blue-gray on bracelet (HAB001), sibling HAB002 (bracelet) and HAB003 (silicone strap)
Dial colours
Grey Blue
Availability
Offered
Status
Current (2026, new 5X63 caliber)
Not published
Lug-to-lug, Weight, Caseback, Lume Help verify
Medium confidence Verified Jul 2026 Source: Seiko (Astron HAB001) 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 Dual-Time Chronograph (5X63)?

The Seiko Astron GPS Solar Dual-Time Chronograph (5X63) has a Titanium (super-hard coating) case. It is recorded at medium confidence pending a maker-stated grade.

What size is the Seiko Astron GPS Solar Dual-Time Chronograph (5X63)?

It is 43.4 mm in diameter, 12.4 mm thick, and water resistant to 100 m.

How much does the Seiko Astron GPS Solar Dual-Time Chronograph (5X63) cost, and is it available?

It is current-production and lists from $2,700.

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