Seiko Astron 100th Anniversary Limited Edition Watch SSH158J1

This Seiko Astron GPS Solar watch commemorates 100 years of Seiko with an elegant design inspired by Earth’s nighttime view from space. Featuring a black dial with a radiant pattern and rose-gold accents, it sits under a dual-curved sapphire crystal. The slim titanium case, paired with rose-gold-plated ceramic on the bezel and bracelet, creates a lightweight yet durable construction with a super-hard coating for scratch resistance. Powered by the advanced in-house 5X83 solar GPS calibre, this watch offers precise timekeeping with a chronograph that measures to 1/20th of a second. With a 6-month power reserve and light charging capabilities, it combines innovation with timeless elegance.

Movement

• 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 )
• Power reserve Operating for approx. 6 months (when fully charged), power save: approx. 2 years
• Jewels 14

Functions

• Overcharge prevention function
• Power save function
• Chronograph up to 12 hours in 1/20 second increments
• Perpetual calendar to the 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/Band

• Case Size
• Thickness:14.1mm
  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
• Distance between lugs 14

Other Details

• Water Resistance 10 bar
• Magnetic Resistance 4,800 A/m
• Weight 124.0g
• Features
• LIMITED EDITION on the case back
• Serial number engraved on the case back
• Against an allergic reaction to nickel
• Clasp with Smart Adjuster function
• Screw case back