How much does the Seiko Astron cost?

The Seiko Astron has a manufacturer MSRP of $3,100 USD. On the secondary market it averages around —.

What movement does the Seiko Astron use?

The Seiko Astron is powered by the 5X83 quartz movement.

How big is the Seiko Astron?

The case measures 44.1mm in diameter, 14.4mm thick, with a 50mm lug-to-lug.

What is the water resistance of the Seiko Astron?

The Seiko Astron is rated to 100m of water resistance.

What kind of crystal does the Seiko Astron have?

The Seiko Astron uses a Sapphire crystal.

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Seiko Astron

Name: Seiko Astron
Brand: Seiko
SKU: ssh175j1
Price: 3100 USD
Availability: InStock

Ref. ssh175j1

Chronograph

3 Variants

Lume:LumiBrite on hands and index(es)

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Retail MSRP

$3,100

Low

—

Avg

—

High

—

Static data

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Case

44.1mm

Power Reserve

—

Movement

Quartz

Water Resistance

100m

Crystal

Sapphire + AR

Case Dimensions

Diameter44.1mm

Thickness14.4mm

Lug-to-Lug50mm

Lug Width14mm

Case Build

MaterialTitanium

Water Resistance100m

Crystal & Dial

CrystalSapphire

ShapeCurved

AR CoatingSuper-clear coating

LumeLumiBrite on hands and index(es)

Movement

Caliber

5X83

TypeQuartz

Beat Rate—

Power Reserve—

Jewels14

HackingNo

Hand-WindingNo

ComplicationsTime only

Design Language

Dial styleSunburst

Sub-dials3

Bezel24-hour (GMT)

Bracelet / strapLug-attached bracelet

HandsBaton

AI-detected from product image · 5/22/2026

In a nutshell

The Seiko Astron (ref. ssh175j1) is a quartz chronograph watch, with a 44.1mm titanium case, 14.4mm thick, powered by the 5X83 movement. Water resistance is rated to 100m, under a sapphire crystal. Manufacturer MSRP is $3,100.

Owners widely praise the Seiko Astron for its spectacular technology, self-sufficiency, and grab-and-go convenience, with one owner calling it the best watch they have ever had. Reviewers and owners highlight the detailed and well-managed dials, often with "Grand Seiko-esque" precision, and appreciate the comfortable, lightweight titanium construction. The solar-powered quartz movement with GPS time sync is a significant draw, offering accurate timekeeping. However, the price point of around €2250-€2400 is frequently cited as high for a quartz watch. Some owners note manual DST implementation, dependence on outdoor conditions or radio tower proximity for GPS sync, and sparse lume. One owner experienced the minute hand sitting slightly off and found the recessed buttons difficult to operate. Accuracy figures vary, with some reporting +/- 15 seconds per month without GPS, while others note autonomous quartz movement accuracy of up to 1/2 second per day.