Astron SSH180J1 [PRE-ORDER]

The Seiko Astron SSH180J1 is a high-tech timepiece built for global living. Powered by GPS solar movement, it automatically adjusts to your time zone and runs for up to six months on a full charge.

It features a chronograph, dual-time display, perpetual calendar (good until 2100), and world time across 38 cities—all packed into a sleek 44.3mm case with a super-clear sapphire crystal.

LumiBrite ensures visibility in the dark, while the smart-adjusting clasp and 10-bar water resistance make it practical for everyday wear. As a limited edition, it’s engraved with a unique serial number, blending innovation with exclusivity.

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 Size

Thickness:14.4mm
Diameter:44.3mm
Lug-to-lug:50.0mm

Crystal

Dual-curved sapphire crystal

Crystal Coating

Super-clear coating

LumiBrite

LumiBrite on hands and index(es)

Clasp

Three-fold clasp with push button release

Distance between lugs

14

Other Details

Water Resistance

10 bar

Magnetic Resistance

4,800 A/m

Weight

115.0

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

• In an actual product, the case back direction might be different from the photograph.