The Wristwatch 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 well under the $5,280 median for the category. It ships on a matching exotic-material bracelet rather than a strap.

Exotic-material chronograph watchesTitaniumGMTUnder $5,000
Price
$2,700
Material
Titanium
Grade / type
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
Colour
Grey
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)
Matching 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, Hardness, Construction, Caseback, Lume
Medium confidence Verified Jul 2026 Source: Seiko (Astron HAB001) Maker / listing ↗
Facts are free to cite with a link.
See it in the interactive guide

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

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OmegaSpeedmaster HB-SIA Co-Axial GMT Chronograph–44.3 mmChronographsame category · same style · shared complications · similar sizeEcho/Neutra Averau 42 Ceramic ChronoEcho/NeutraAverau 42 Ceramic Chrono$2,13042.0 mm14.6 mm thickChronographsame category · shared complications · similar price · similar size

More exotic-material watches from Seiko

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SeikoProspex "Cave Diver" Shogun Titanium (SPB357)$1,50043.0 mmDiverSeiko Prospex Marinemaster Professional 600m Titanium (SBDX067)SeikoProspex Marinemaster Professional 600m Titanium (SBDX067)$4,60045.4 mmDiverSeiko Prospex LX Line Spring Drive GMT Titanium (SNR035)SeikoProspex LX Line Spring Drive GMT Titanium (SNR035)$5,25044.8 mmOther

Frequently asked questions

What is the case material of 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 material.

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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