Celebrating 145 years of Seiko's pioneering watchmaking, the Astron GPS Solar HAB004J1 brings a distinguished heritage into dazzling contemporary focus. Limited to just 2,000 pieces worldwide, this exceptional anniversary edition pairs a richly textured white-silver dial with vivid Seiko Blue accents, creating a striking interplay of light, colour, and depth. Blue sub-dials and a matching seconds track lend definition to the symmetrical display, while a gold-coloured dial ring adds a warm, celebratory flourish. Sculptural lines and a sharply faceted bezel give the super-hard-coated titanium case its commanding presence, balanced by a lightweight construction and low centre of gravity for comfortable wear. Measuring 43.4mm across, 12.4mm thick, and 50mm from lug to lug, with a 14mm lug width, the case is complemented by a matching titanium bracelet with an easy-adjust three-fold push-button clasp. An exclusive blue-and-white silicone strap is also included, with Seiko's quick-change system allowing an effortless transition from polished sophistication to a more sporting expression. Beneath sapphire crystal with Seiko's super-clear coating, LumiBrite hands and hour markers ensure the dial remains legible as the light fades. At its heart, the in-house calibre 5X63 GPS Solar movement combines 14 jewels with light-powered efficiency, delivering approximately six months of operation from a full charge, or up to two years in power-saving mode. GPS-controlled time and time zone adjustment accompanies world time across 38 cities, while dual-time functionality and a time transfer feature allow the main and subsidiary time displays to be exchanged with ease. A chronograph measures up to 24 hours in 1/20-second increments, complemented by day and date displays, a perpetual calendar correct until 28 February 2100, and a power reserve indicator. Daylight saving time functionality, in-flight mode, and automatic hand position alignment further enhance its travelling credentials. Finished with a screw-fastened case back bearing the LIMITED EDITION inscription and water resistance to 100 metres, this commemorative Astron unites the refinement of a collector's timepiece with Seiko's enduring spirit of innovation. • Powered by the GPS solar powered 5X63 calibre movement with 14 jewels and a power reserve of up to 6 months • Presented on a silver titanium bracelet with super-hard coating and a push button deployment clasp • Scratch resistant sapphire crystal glass with super-clear coating • 43.4mm case width & 50.0mm case length measuring from lug to lug • 100 metre water resistance