Introduction This Seiko Astron is a high-technology GPS solar wristwatch combining advanced functionality with a robust and modern design. Featuring a ceramic and titanium construction, this model represents Seiko’s leadership in innovative timekeeping. Historical & Collector Value The Seiko Astron series is historically significant as the world’s first GPS solar watch, capable of automatically adjusting to local time zones using satellite signals. Models equipped with the 5X53 caliber are valued by collectors for their precision, durability, and practical global usability, making them a modern milestone in horological development. Specifications • Brand: Seiko • Collection: Astron GPS Solar • Movement: Solar GPS • Case Material: Titanium with ceramic components • Bracelet Material: Titanium • Case Size: 42.6 mm • Water Resistance: 10 bar • Crystal: Sapphire • Features: GPS time synchronization, world time, chronograph, perpetual calendar • Accessories: Original box, instruction manual • Case / Model No.: 5X53-0AB0 Condition Condition: The watch shows signs of use consistent with normal wear. Minor surface scratches are present on the case and bracelet. Dial and crystal remain clean with good visibility. Please review the photos carefully for overall condition. Service History Fully tested and confirmed working. Overhaul has been completed (OH completed), ensuring reliability and peace of mind for the next owner. Shipping & Customs International shipping is available. All customs duties, import taxes, and related charges are the responsibility of the buyer.