SEIKO ASTRON HAB005J1 GPS SOLAR 2026 CHRONOGRAPH LIMITED EDITION MEN WATCH

Seiko Astron HAB005J1 — GPS Solar 2026 Dual Time Chronograph Limited Edition

The Seiko Astron HAB005J1 is the green limited edition in Seiko's GPS Solar 2026 series — a 1,200-piece worldwide release featuring a multi-faceted "Crystal Green" dial inspired by the structures and light-play of quartz crystals. Built on the calibre 5X63 platform, it delivers GPS-synchronised timekeeping accurate to ±1 second per 100,000 years with daily automatic adjustment, a dual-time chronograph measuring 24 hours in 1/20-second increments, and a perpetual calendar that needs no manual correction until February 2100. The 43.4 mm titanium case with super hard coating is roughly 40% lighter than the equivalent in stainless steel and just 12.4 mm thick — a full millimetre slimmer than the previous generation. A new interchangeable bracelet system with a push-button release integrated into the end link lets you swap between the titanium bracelet and the included black silicone strap without tools. Its sibling, the HAB006J1, offers the same specification in a pink "Crystal Pink" dial — same 1,200-piece limitation, same case, same movement.

Key Features

• Seiko calibre 5X63 GPS Solar movement — 14 jewels, solar-powered by any light source, GPS-synchronised for automatic time and timezone adjustment
• Accuracy: ±1 second per 100,000 years with daily GPS sync — ±15 seconds per month without sync
• Power reserve: approx. 6 months fully charged, approx. 2 years in power-save mode — no battery changes required
• Dual-time chronograph — 24-hour measurement in 1/20-second increments with split-time capability, plus simultaneous second-timezone display
• Perpetual calendar — automatically adjusts for short months and leap years until February 2100, with day and date display
• World time with GPS — pinpoints location via 4+ GPS satellites and identifies exact timezone; manual adjustment also available
• Flight mode — blocks GPS signal reception during flights to comply with airline requirements
• DST adjustment and automatic hand alignment — Daylight Saving Time handled automatically, hands re-sync if displaced by shock
• Crystal Green multi-faceted dial — inspired by quartz crystal structures, creating shifting light reflections across angular surfaces with black sub-dials at 3, 6, and 9 o'clock
• 43.4 mm titanium case with super hard coating — 12.4 mm thick / 50.0 mm lug-to-lug, lightweight and scratch-resistant
• Sapphire crystal with Super-Clear anti-reflective coating — Seiko's proprietary coating for maximum clarity on the faceted dial
• LumiBrite on hands and markers — full low-light legibility
• 100 metres water resistance — suitable for swimming and everyday wear
• Interchangeable titanium bracelet with push-button end-link release — tool-free swap to the included black silicone strap
• Power reserve indicator — visible remaining charge level on the dial
• Limited to 1,200 pieces worldwide — special presentation box with additional silicone strap included

Why You'll Love It

The HAB005J1 is the Astron for the traveller who wants GPS precision wrapped in a genuinely distinctive dial. The Crystal Green faceted surface is not a colour applied to a flat disc — it is a three-dimensional angular structure that shifts in tone and reflection as light moves across it, giving the watch a presence that flat dials at any price point cannot replicate. Underneath that dial, the 5X63 removes the entire concept of timekeeping maintenance: GPS sync handles accuracy, solar power handles the battery, and the perpetual calendar handles the date — you set it once and forget it until 2100. The titanium case with super hard coating means the watch wears lighter than its 43.4 mm diameter might suggest, and the new push-button bracelet-swap system borrowed from the same engineering philosophy as high-end Swiss quick-change systems gives you genuine strap versatility without a spring-bar tool. At 1,200 pieces it is the most limited current-production Astron aside from the 145th Anniversary models — collectible, but with genuine daily-use technology that justifies wearing it rather than storing it.

HAB005J1 vs HAB006J1 — Which GPS Solar 2026?

The HAB005J1 and HAB006J1 share identical specifications — same 5X63 calibre, same 43.4 mm titanium case with super hard coating, same sapphire with Super-Clear coating, same dual-time chronograph, same perpetual calendar, same 100 m water resistance, same interchangeable bracelet system. The only difference is dial colour: Crystal Green on the HAB005J1, Crystal Pink on the HAB006J1. Both are limited to 1,200 pieces worldwide. Choose the one whose dial colour speaks to you — no specification trade-offs either way.

The Seiko Astron Story

Astron is the name Seiko gave to the world's first quartz wristwatch — the Seiko Quartz Astron 35SQ, released on Christmas Day, 1969, in a moment that changed the entire watch industry. The Astron name lives on today as Seiko's platform for its most advanced quartz timekeeping technologies, using GPS Solar movements that combine solar power with satellite signal reception for automatic time-setting and timezone adjustment anywhere on Earth. The story begins in 1881, when Kintaro Hattori founded a clock and watch shop in Ginza, Tokyo — the business that would become the Seiko of today. As one of the few fully integrated watch manufactures in the world, Seiko designs and builds movements, cases, dials, and hands in-house, ensuring quality control at every step. The HAB005J1 carries that legacy forward with the most travel-capable and technically complete GPS Solar Astron in the 2026 lineup.

Backed by Seiko's official warranty. Authentic Seiko Astron GPS Solar 2026 Limited Edition, sold by authorised retailer City Chain Singapore.

Explore the full Seiko Astron Collection, see all Seiko Limited Editions, or browse all Seiko watches at City Chain Singapore.