Seiko’s Astron GPS Solar collection is now available with entirely new caliber 5X with improved technology and compact dimensions. Measuring just 42.9mm in diameter and 12.2mm in depth, the new GPS Astron 5X is the world’s smallest and thinnest GPS solar watch.
To enhance the speed and quality of the GPS connection, every component in the GPS module has been re-engineered. The operation of the 5X caliber is also faster and more intuitive than ever.
New functions also allow automatic 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. Its comfort on the wrist is further enhanced by a new buckle system that the wearer can use to make the minor adjustments that are so important when temperature or other changes make the wrist expand or contract.

Like all its predecessors, the new Astron 5X series adjusts at the touch of a button to your time zone by connecting to the GPS satellite network. As it takes all the energy it needs from light alone, this watch never needs a battery change and yet delivers the astonishing precision of an atomic clock.

It even connects twice a day to the satellite network; the first connection is made after the dial sensor detects sunlight and the second is made at a time pre-determined and set by the owner. If there are changes in the region / time zone, manual time zone selection may be required.

The new design is striking and yet refined. With its three dimensional dial, bold hands and the sharp lines and distortion-free surfaces that only Zaratsu polishing can achieve, the design is instantly recognisable as Astron and the perfection in every detail speaks volumes for the care taken at every stage of the manufacture and for the enduring beauty of the result.

The new 5X caliber will be available in December in four design variations, including one limited edition of 2,000, inspired by the remarkable astronomical phenomenon of the supernova, a star that, at the end of its life, explodes and releases vast amounts of energy.
All the above models have titanium cases and ceramic bezel-inserts. The first two references SSH001J1 and SSH003J1 come with titanium bracelet, crown and pushers. The ref. SSH006J1 has a titanium case with rose gold color coating, black ceramic pushers and crown, and black rubber strap. The reference SSH007J1 has a titanium case, black ceramic crown and pushers, and dual-tone bracelet featuring titanium and black ceramic links.
In addition to these four creations, two more will be added in February 2019, each with a bezel using sapphire crystal and ceramic.

These two models (SSH009J1 and SSH011J1) have 43.5mm diameter cases in titanium. Both models feature black ceramic crown and pushers and dual-toned bracelets.
Technical details
Model: Seiko Astron GPS Solar 5X Series
References
- SSH001J1: Titanium case, crown, pushers and bracelet/ Black dial/ Titanium bezel with blue ceramic bezel-insert.
- SSH003J1: Titanium case, crown, pushers and bracelet/ Black dial/ Titanium bezel with black ceramic bezel-insert.
- SSH006J1: Rose gold toned titanium case and bezel/ Black ceramic crown and pushers/ Black dial/ Black ceramic bezel-insert/ Black rubber strap.
- SSH007J1: Titanium case/ Black Ceramic crown and pushers/ Blue Dial/ Rose gold toned bezel with black ceramic bezel-insert/ Titanium and black ceramic bracelet/ Limited edition of 2,000 pieces.
- SSH009J1: Titanium case/ Black Ceramic crown and pushers/ Black Dial/ Black ceramic bezel with two tone (blue and black) sapphire bezel-insert/ Titanium and black ceramic bracelet.
- SSH011J1: Titanium case/ Black Ceramic crown and pushers/ Black Dial/ Black ceramic bezel with two tone (black and white) sapphire bezel-insert/ Titanium and black ceramic bracelet.
Movement
Caliber 5X53
GPS controlled time and time zone adjustment
Dual-Time with AM/PM indication
Perpetual calendar correct to the year 2100
Automatic DST adjustment function
High speed time zone adjustment
Time transfer function
Signal reception result indication
World time function (39 time zones)
Power save function
Accuracy: +/-15 seconds per month (without receiving a GPS signal and at temperatures between 5°C and 35°C)
Case
Titanium case with super-hard coating (SSH001/003/007/009/011)
Titanium case with super-hard rose gold color coating (SSH006)
Ceramic bezel (SSH001/003/006/007)
Sapphire crystal and ceramic bezel (SSH009/011)
Sapphire crystal with super-clear coating
Water resistance: 10 bar
Magnetic resistance: 4,800 A/m
Diameter: 42.9mm, Thickness: 12.2mm (SSH001/003/006/007)
Diameter: 43.5mm, Thickness: 13.3mm (SSH009/011)
Strap
Titanium with super-hard coating bracelet (SSH001/003)
Titanium with super-hard coating and ceramic bracelet (SSH007/009/011)
Extra-strength silicone strap (SSH006)
Easy adjust three-fold clasp with push button release
Retail price
Approximate recommended retail prices in Europe: 2,200 Euro (SSH001/003/006) / 2,400 Euro (SSH007) / 2,600 Euro (SSH009/011)