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Gent’s Seiko Astron “Supernova” GPS Solar 5x 1500 piece Limited Edition – SSH123J1

There are just 1,500 pieces of this limited edition design available worldwide.

The “Supernova” marks the 10 year anniversary of the Astron – the world’s first GPS Solar watch created by Seiko; powered by light, automatically adjusting to the exact time through the latest satellite technology. This timepiece is from the “Solidity” collection which underlines the continuing relevance of its technological design.

The deep purple glitter gradation on the dial is in a “Supernova” effect, whilst the solid ceramic bezel, stylish case and pushers with high visibility 3-dimensional indices make it a robust, reliable watch.

Powered by the Seiko in-house 5X calibre with advanced functionality – every component in the GPS module has been re-engineered to make it faster and more intuitive than ever. Just three seconds are needed to advance 14 hours from Tokyo to New York time, thanks to the system that moves hour, minute, and second hand independently. The functions allow easy adjustment to Daylight Saving Time and give the wearer the ability to switch the main dial instantly from home to local time and vice versa. When a time zone adjustment is required, all it takes is a simple push of a button and the hands move faster than ever to the exact local time.

Seiko Astron: the world’s first GPS solar watch – powered by light, automatically adjusted to your exact time through the latest satellite technology.

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±15 seconds per month (±1 second per day) without receiving a GPS signal and at temperatures between 5°C and 35°C
Movement Type:
GPS Solar
Power Reserve:
Operating for approx. 6 months (when fully charged)

Watch Case

Case Material:
Titanium/ceramic bezel
Case Thickness:
Case Diameter:
Case Length:
Lug Width:


Dial Colour:
Lumibrite on hands and indexes
Three-fold clasp with push button release

Other Specifications

Water Resistance:
Crystal Type:
Sapphire Crystal – Super-Clear Coating
Date Function:
Day and Date Perpetual calendar until 28th February 2100
Watch Category:
Seiko Astron
GPS Solar 5x

Model Number

At GL Ryan Jewellers we are passionate about time.
From subtle and elegant watches to the unusual and bespoke novelty Swiss watches.
We have a wide range of exclusive limited edition watches, Swiss luxury to our boutique selection and everything in between.
We are proud to be stockists of Seiko, which we are a Seiko Boutique, Citizen, Bulova, G-Shock, and Swiss brands Roamer and Frederique Constant.

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