Seiko Astron HAB004J1 Limited Edition 145th Anniversary – 43.4 mm

The Seiko Astron HAB004J1 celebrates Seiko's 145th anniversary, combining GPS solar technology, dual-time function, and stopwatch function in an ultra-light titanium case. Precision, innovation, and everyday usability come together in a modern travel instrument that reliably receives time worldwide.

Technical Specification

Movement

• Caliber 5X63 (GPS Solar)
• Accuracy: ±15 seconds per month
• Power Reserve: approx. 6 months at full charge
• Power Save Mode: approx. 2 years
• 14 jewels

Functions

• Overcharge prevention function
• Power save function
• Stopwatch function up to 24 hours in 1/20-second increments
• Perpetual calendar up to February 28, 2100
• World time function (38 cities)
• Dual-time display
• Day display
• Power reserve indicator
• Time transfer function between main and sub-dial
• GPS signal reception (time zone, automatic time, manual time)
• Satellite acquisition status display
• Reception result display
• Daylight saving time function
• In-flight mode
• Automatic hand alignment function

Case & Glass

• Material: Titanium with Super-Hard-Coating
• Diameter: 43.4 mm
• Height: 12.4 mm
• Length: 50.0 mm
• Glass: Sapphire crystal
• Coating: Super-Clear-Coating LumiBrite on hands and indexes, Screw-down case back and quick-change system

Bracelet

• Material: Titanium
• Color: Silver
• Clasp: Three-fold clasp with push button release
• Lug width: 14 mm
• Additional bracelet: Silicone

Water Resistance & Magnetic Resistance

• Water Resistance: 10 bar
• Magnetic Resistance: 4,800 A/m

Dial

• Color: Silver
• Indexes: LumiBrite
• Hands: LumiBrite

Special Features

• LIMITED EDITION engraving on the case back
• Limited to 2,000 pieces
• GPS Solar Technology
• Dual-Time Display at 6 o'clock
• Perpetual Calendar
• Innovative quick-change bracelet system