Astron GPS Solar Dual-Time Chronograph Limited Edition

High-speed, precision global timekeeping

Extending the legacy of the Seiko Astron—the world’s first commercially available quartz watch—this 2025 Limited Edition is designed for a new generation of leaders, combining advanced technology with contemporary style. Limited to 1,200 individually numbered pieces, it is powered by Seiko’s 5X83 GPS Solar caliber, which provides high-speed GPS dual-time functionality and rapid time-zone adjustment across 39 time zones. Its chronograph measures elapsed time in 1/20-second increments, while additional functions include an AM/PM indicator, daylight-saving-time adjustment, power-save function, a perpetual calendar accurate through 2100, and a time-transfer function that switches the main-time and dual-time displays at the press of a button. Powered by light, the watch does not require routine battery replacement.

The watch features a lightweight titanium bezel with a black ceramic insert and vivid orange accents, topped by dual-curved sapphire crystal with super-clear coating. Its silver dial has a distinctive textured pattern and a high-contrast layout for improved legibility, with four vertically arranged subdials reinforcing its sporty character. A date display and LumiBrite hands and markers improve visibility in low-light conditions. The titanium case and bracelet feature a super-hard coating for added durability, while bold black ceramic inner links provide contrast and a refined finish. The bracelet is secured by a tri-fold push-button clasp with Seiko’s Smart Adjuster function, and the watch is water-resistant to 10 bar, or 100 meters.

Limited edition of 1,200 pieces

Specifications

• Caliber Number: 5X83
• Movement Type: GPS solar
• Precision: ±15 seconds per month (without receiving a GPS signal and at temperatures between 5°C and 35°C)
• Jewels: 14
• Overcharge prevention function
• Power save function
• Chronograph up to 12 hours in 1/20 second increments
• Perpetual calendar to February 28, 2100
• World time function (38 cities)
• Dual-time function
• Day display
• Power reserve indicator
• Time transfer function (Switching between the main-dial and sub-dial)
• GPS signal reception function (Time zone adjustment, automatic time adjustment, manual time adjustment)
• Satellite acquisition status display function
• Reception result display function
• DST (Daylight Saving Time)
• Function to prevent the GPS signal reception (in-flight mode)
• Automatic hand position alignment function
• Case Material: Titanium (super-hard coating) with ceramic/aluminum bezel
• Case Size: Thickness: 13.4mm, Diameter: 43.4mm, Lug-to-lug: 49.5mm
• Crystal: Dual-curved sapphire crystal
• Crystal Coating: Super-clear coating
• LumiBrite: Lumibrite on hands and index(es)
• Clasp: Three-fold clasp with push button release (with Smart Adjuster function)
• Distance Between Lugs: 14mm
• Water Resistance: 10 bar (100 meters)
• Weight: 123.0g
• LIMITED EDITION on the case back
• Serial number engraved on the case back
• Screw case back