SEIKO Astron GPS Solar 145th Anniversary Limited Edition | SSH186

In celebration of Seiko’s 145th anniversary, a special limited-edition model tracing Seiko’s legacy is now available.

In 2026, Seiko will celebrate its 145th anniversary. Since its founding in 1881, the company has viewed watches as a potential solution to social challenges, consistently pursuing innovation while upholding founder Kintaro Hattori's philosophy to be “always one step ahead of the rest."

This new GPS Solar Dual-Time Chronograph celebrates Astron's spirit of innovation. Symbolizing success and prosperity, gold-colored accents grace every part of the watch, from the dial and bracelet to the case.

The bezel features a gold-colored sapphire crystal insert that adds depth and dimension. Even the gold-colored markings at 1, 4, and 5 on the UTC scale offer a subtle tribute to the 145th anniversary.

Specifications

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 Material: Titanium (super-hard coating)
  
• Case Size:
  
  • Thickness: 14.4mm
    
  • Diameter: 44.1mm
    
  • Lug-to-lug: 50.0mm
    
• Crystal: Dual-curved sapphire crystal
  
• Crystal Coating: Super-clear coating
  
• Clasp: Three-fold clasp with push button release
  
• Bracelet Length: 190.0
  
• Distance between lugs: 14

Other Details

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