A legacy in blue: Seiko marks 145 years with a striking new limited edition Astron GPS solar
Alongside the trio of new Astron GPS solar watches announced recently, Seiko was apparently holding one more variant up its sleeve. Meet the HAB004: a limited-edition model launching as part of the second series of watches commemorating Seiko’s 145th anniversary.
The Seiko Astron GPS solar HAB004 shares the exact same skeleton as the standard HAB001, HAB002, and HAB003 models. You’re getting a 43.4mm titanium case treated with a super-hard coating, topped with a new two-piece octagonal bezel that keeps the watch's center of gravity low for improved wearability. The color scheme is where we see a big departure from the rest of the lineup.
The beautiful light silver dial features a geometric pattern of interlocking triangles, nicely contrasted by striking blue accents inspired by the company’s signature Seiko Blue color. The rich blue tones are used on the subdials, chapter rings, and the seconds track.
The HAB004 is powered by Seiko’s new in-house Cliber 5X63, which the company says is the most powerful solar GPS movement it has to offer. It's a serious piece of hardware that combines dual-time tracking with a perpetual calendar programmed through the year 2100 and the ability to receive GPS signals from four or more GPS satellites to pinpoint your location and automatically sync the watch to your local time whenever you land. It also boasts up to 6 months of battery life on a full solar charge, 10 bar water resistance, and an anti-magnetic rating of 4,800 A/m.
Like its siblings, the HAB004 also adopts Seiko’s new Quick-Change band system, which lets you detach the titanium bracelet with a simple push of a button. This will come in handy when you want to change things up and swap in the exclusive blue-and-white silicone strap that comes in the box for a sportier look.
Pricing & Availability
The Seiko Astron 145th Anniversary Limited Edition will go on sale in Japan, the US, the UK, Australia, and Europe in June. The official pricing in various regions is as follows:
Specifications
- Availability: Launching globally in June 2026
- Limited edition: 2,000 pieces worldwide
- Movement: Seiko Caliber 5X63 GPS Solar
- Accuracy: ±15 seconds per month (without GPS signal reception, between 5°C and 35°C)
- Power reserve: Approx. 6 months on full charge; up to 2 years in power-save mode
- Case material: Titanium with super-hard coating
- Case size: 43.4mm diameter × 12.4mm thickness × 50.0mm lug-to-lug
- Case back: Screw-down case back with “LIMITED EDITION” engraving
- Bezel: Two-piece octagonal titanium bezel
- Crystal: Sapphire crystal with super-clear coating
- Dial: Light silver textured dial with blue subdials and chapter rings
- Lume: LumiBrite on hands and indices
- Bracelet: Titanium bracelet with easy-adjust three-fold clasp
- Additional strap: Blue-and-white silicone strap included
- Quick-change system: Push-button strap and bracelet release system
- Water resistance: 10 bar (100 meters)
- Magnetic resistance: 4,800 A/m
- World time: 38 cities
- Dual-time display
- 24-hour chronograph
- GPS time zone adjustment
- Automatic/manual GPS time syncing
- Perpetual calendar (through February 28, 2100)
- Power reserve indicator
- Day display
- DST support
- In-flight mode
- Time transfer function
- Automatic hand position alignment
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