Seiko marks its 145th anniversary with this limited-edition Astron, driven by the advanced GPS Solar Dual-Time Chronograph Calibre 5X63. The symmetrical dial layout features striking blue accents inspired by the signature Seiko Blue, set against a light silver main dial for a modern, refined look.

The lightweight titanium case with a super-hard coating includes a quick-change system, allowing an effortless switch between the titanium bracelet and the included exclusive blue-and-white silicone strap for versatile styling.

Brand	Seiko
Model Number	HAB004J1
Collection	Astron
Movement Type	GPS Solar
Calibre Number	5X63
Precision	±15 seconds per month
Power Reserve	Approx. 6 months (fully charged), power save: approx. 2 years
Jewels	14
Case Material	Titanium (super-hard coating)
Case Diameter	43.4mm
Case Thickness	12.4mm
Lug-to-Lug	50.0mm
Crystal	Sapphire crystal with super-clear coating
LumiBrite	Hands and indexes
Clasp	Easy-adjust three-fold clasp with push button release
Water Resistance	10 bar
Magnetic Resistance	4,800 A/m
Functions	Chronograph up to 24 hours, perpetual calendar, world time (38 cities), dual-time, day display, power reserve indicator, GPS signal reception
Features	Limited edition on case back, additional silicone strap included, quick-change system, screw case back
Gender	Men's

Seiko Astron 145th Anniversary Limited Edition Solar Titanium Watch