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Seiko Astron
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Seiko Astron

Chronograph

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.

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Astron
Astron
Astron
Astron
Astron
Astron GPS Solar 2024 Limited Edition
Astron GPS Solar 2025 Limited Edition
Astron GPS Solar 2025 Limited Edition
Astron GPS Solar 2026 Limited Edition
3 Variants
Lume:LumiBrite on hands and index(es)
Buy from Seiko ↗
Buy used on eBay ↗
Retail MSRP
$3,100
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Avg
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Alternatives
Case
44.1mm
Power Reserve
—
Movement
Quartz
Water Resistance
100m
Crystal
Sapphire + AR
01

Case Dimensions

Diameter44.1mm
Thickness14.4mm
Lug-to-Lug50mm
Lug Width14mm
02

Case Build

MaterialTitanium
Water Resistance100m
03

Crystal & Dial

CrystalSapphire
ShapeCurved
AR CoatingSuper-clear coating
LumeLumiBrite on hands and index(es)
04

Movement

Caliber
5X83
TypeQuartz
Beat Rate—
Power Reserve—
Jewels14
HackingNo
Hand-WindingNo
ComplicationsTime only
05

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 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.

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