Seiko - Astron GPS Solar Limited Edition of 1,500 Pieces 5X - SSH187

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Seiko Astron GPS Solar 2026 Limited Edition. A design featuring a mysterious galaxy of swirling stars. This watch’s dial features a newly developed embossed spiral pattern, which radiates from the center to convey the energy of flowing stars. The all-black case and bracelet, paired with a dark turquoise-colored dial infused with glitter, evokes the image of swirling galaxies emerging from the pitch-black cosmos. The case and bracelet are finished with a scratch-resistant hard coating designed to maintain a jet-black sheen. The clasp’s adjustment system allows for easy fine-tuning of the bracelet’s length.

Astron GPS Solar Limited Edition. With the strong, sleek lines of the Seiko Astron, the world’s first commercially available quartz watch, today’s Astron is designed for a new generation of leaders, breaking through to the future with excellence in both innovation and style. Available only in a controlled-production run of 1,500, with the serial number engraved on each caseback, this dynamic timepiece evokes a swirling galaxy in the vast darkness of space. Framed by a titanium bezel with turquoise accents and a glossy ceramic insert, the dark turquoise patterned dial has a subtle sparkle expressing new stars being born to the spiral galaxy and their unknown trajectories. 

Equipped with Seiko’s 5X83 caliber, offering both high-speed GPS dual time and time zone adjustment to 39 time zones and a chronograph function that measures elapsed time in 1/20th second increments, the high precision timepiece also features an AM/PM indicator, daylight saving time function, power save function, perpetual day/date calendar correct to the year 2100, and a time transfer function that allows the user to switch the main time and dual time indications with the push of a button, all powered by light energy with no battery change required. The unique turquoise dial displays four sub-dials, a date calendar, and LumiBrite hands and markers. Crafted of light and durable titanium with black super hard coating, this superb creation also includes a sapphire crystal with super-clear coating, secure screw-down case-back, and tri-fold push button release clasp with Smart Adjuster function. 100 meter Water Resistant.

CASE DIMENSIONS
Thickness:13.4 mm
Diameter: 43.3 mm
Length: 49.5 mm

MOVEMENT
Caliber 5X83
Powered by light energy - no battery change required
Power reserve: approximately 6 months once fully charged
GPS Solar Chronograph

CASE: Titanium case with black super-hard coating
CRYSTAL MATERIAL: Dual curved sapphire crystal with super clear coating
WATER RESISTANCE: 100 meters / 330 feet
DIAL COLOR: Turquoise
STRAP: Titanium bracelet with black super-hard coating
LUG WIDTH: 14 mm

Power reserve: Operating for approx. 6 months (when fully charged), 
power save: approx. 2 years
Jewels: 10
Functions:
Overcharge prevention function
Power save function
Perpetual calendar to the february 28, 2100
Power reserve indicator
GPS signal reception function (Time zone adjustment, automatic time adjustment, 
manual time adjustment)
Satellite acquisition status display function
Reception result display function
Function to prevent the GPS signal reception (in-flight mode)
Automatic hand position alignment function
Date display

SSH187 Seiko Astron
Seiko Astron SSH187