Description
Seiko has poured two summer colourways into the Astron GPS Solar Dual-Time Chronograph it re-engineered in May for its 145th anniversary. The new Crystal Green (HAB005J1) and Crystal Pink (HAB006J1) keep the line's reworked titanium case and GPS-solar Caliber 5X63 but introduce a newly developed pressed dial pattern inspired by the facets of quartz crystal — a fresh, radiant green on one, a pinkish-purple on the other.
These are not full redesigns but expressive seasonal references, each a limited edition of 1,200 pieces at EUR 3,000. The pink HAB006J1 lands first in June 2026, with the green HAB005J1 following in July. For a GPS-solar watch that usually plays its colours safe, they are unusually playful.
Design
Both references share the line's reworked case: 43.4 mm in diameter, 50 mm lug-to-lug and 12.4 mm thick, in titanium with a super-hard coating, topped by a newly introduced two-piece octagonal titanium bezel whose brushed top surface contrasts with polished, faceted sides — a faintly Genta-esque, integrated-sports profile. A sapphire crystal with super-clear coating sits over the dial; water resistance is 10 bar (100 m) and magnetic resistance 4,800 A/m.
The story is in the dials: a crystal-pressed geometric pattern that catches light differently across the two colours, green on the HAB005J1 and a distinctive pinkish-purple on the HAB006J1. A quick-change system lets owners swap between the titanium bracelet and the included black silicone strap without tools, and each watch ships in a presentation box with the secondary strap.
Specifications
- References: HAB005J1 (Crystal Green) / HAB006J1 (Crystal Pink)
- Case diameter: 43.4 mm
- Lug-to-lug: 50 mm
- Case thickness: 12.4 mm
- Case material: titanium with super-hard coating
- Bezel: two-piece octagonal titanium (brushed top, polished faceted sides)
- Crystal: sapphire with super-clear coating
- Water resistance: 10 bar (100 m)
- Magnetic resistance: 4,800 A/m
- Dial: crystal-pressed pattern — green (HAB005J1) or pinkish-purple (HAB006J1)
- Movement: Seiko Caliber 5X63, GPS Solar (in-house)
- Functions: GPS time/zone sync, dual-time, chronograph (to 24 hours in 1/20-second increments), perpetual calendar to 2100, world time (38 zones), automatic DST, power-reserve indicator
- Accuracy: ±15 seconds per month (without GPS reception)
- Autonomy: ~6 months on a full charge
- Strap system: quick-change titanium bracelet + included black silicone strap
- Limited edition: 1,200 pieces per reference
- Price: EUR 3,000 each
- Availability: HAB006J1 (pink) June 2026; HAB005J1 (green) July 2026
What's Exciting
The substance here isn't the colour — it's the case and calibre the colour rides on. The 5X63 generation is genuinely new: it lands about 1 mm thinner than the outgoing 5X83, adds 24-hour chronograph timing, and wraps it all in a sharper two-piece octagonal titanium case with a tool-free strap-change system. Against that backdrop, the crystal-pressed Green and Pink dials are the most expressive this line has offered, turning a famously gadget-forward solar watch into something with genuine wrist presence.
At EUR 3,000 for an in-house GPS-solar movement with a perpetual calendar to 2100, six-month autonomy and world-time across 38 zones, the value proposition remains strong. These two are the fun, summer-flavoured way into a seriously capable watch — and at 1,200 pieces each, limited enough to feel like a pick rather than a default.
History
Seiko changed quartz watchmaking in 1969 with the original Quartz Astron, the world's first quartz wristwatch. In 2012 it relaunched the Astron name around a new idea: a watch that pulls the time and time zone straight from GPS satellites and runs entirely on light. The GPS Solar Astron has been Seiko's high-technology flagship ever since.
The Dual-Time Chronograph these Crystal colours belong to debuted in May 2026 as part of Seiko's 145th-anniversary year (the brand traces to Kintaro Hattori's 1881 Ginza shop), introducing the new Caliber 5X63 and a redesigned octagonal-bezel titanium case. The Crystal Green and Crystal Pink extend that platform with the season's most colourful dials.
