Seiko - Astron GPS Solar 145th Anniversary Limited Edition - SSH186

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Seiko 145th Anniversary Limited Edition Limited edition of 1,450 pieces
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.

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: 14.4 mm
Diameter: 44.1 mm
Lug-to-lug: 50 mm
Crystal: Dual-curved sapphire crystal
Crystal Coating: Super-clear coating
Clasp: Three-fold clasp with push button release
Bracelet Length: 190 mm
Distance between lugs: 14 mm

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

SSH186 Seiko Astron
Seiko Astron SSH186
SSH 186