Seiko Astron Solar GPS Men's 43.40mm Watch HAB003J

The Seiko Astron GPS Solar HAB003J is a dual-time chronograph built around Seiko's Calibre 5X63 movement, drawing power from any light source and storing up to two years of charge in power-save mode. Connected to the GPS satellite network, it automatically adjusts the time, timezone and Daylight Saving changes wherever you are, with accuracy independent of a battery.

The 43.40mm titanium case is finished with a super-hard coating and measures 12.4mm thick, with a 50mm lug-to-lug for a comfortable fit on the wrist. A black dial with gold-tone indices, hands and sub-dial accents sits beneath sapphire crystal finished in a super-clear coating, framed by a faceted bezel with UTC markings.

Three sub-dials handle the watch's functions: a 1/20-second chronograph counter, a day-of-week and UTC indicator, and a GPS Solar 24-hour display, alongside a date window. A power reserve indicator and satellite acquisition display keep you informed at a glance, and an in-flight mode allows GPS reception to be switched off when required.

The watch is fitted with a black silicone strap and secured by an easy-adjust three-fold clasp with push-button release, built on Seiko's quick-change strap system. It's water resistant to 100m and rated to 4,800 A/m magnetic resistance, with a durable titanium case construction.