Seiko Astron 145th Anniversary Limited Edition SSH186
A special limited edition celebrating Seiko’s legacy
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.
Limited edition of 1,450 pieces
Specifications
- Case: Titanium (super-hard coating) with LIMITED EDITION on the case back
- Caseback: Screw-down
- Size: 44.1mm x 14.4mm thick (50mm lug-to-lug)
- Caliber Number: 5X83 GPS solar
- 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
- Crystal: Dual-curved sapphire with super-clear coating
- Bracelet: Titanium with tri-fold clasp with push button release, Smart Adjuster function
- Water resistance: 100 meters (10 bar)
Product Information
Product Information
Shipping & Returns
Shipping & Returns




Seiko Astron 145th Anniversary Limited Edition SSH186
Seiko Astron 145th Anniversary Limited Edition SSH186
A special limited edition celebrating Seiko’s legacy
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.
Limited edition of 1,450 pieces
Specifications
- Case: Titanium (super-hard coating) with LIMITED EDITION on the case back
- Caseback: Screw-down
- Size: 44.1mm x 14.4mm thick (50mm lug-to-lug)
- Caliber Number: 5X83 GPS solar
- 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
- Crystal: Dual-curved sapphire with super-clear coating
- Bracelet: Titanium with tri-fold clasp with push button release, Smart Adjuster function
- Water resistance: 100 meters (10 bar)
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
A special limited edition celebrating Seiko’s legacy
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.
Limited edition of 1,450 pieces
Specifications
- Case: Titanium (super-hard coating) with LIMITED EDITION on the case back
- Caseback: Screw-down
- Size: 44.1mm x 14.4mm thick (50mm lug-to-lug)
- Caliber Number: 5X83 GPS solar
- 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
- Crystal: Dual-curved sapphire with super-clear coating
- Bracelet: Titanium with tri-fold clasp with push button release, Smart Adjuster function
- Water resistance: 100 meters (10 bar)















