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Seiko Astron
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Seiko Astron

GMT

Owners widely praise the Seiko Astron for its spectacular technology, solar-powered quartz movement, and GPS time synchronization, making it a convenient grab-and-go option. The watch is frequently noted for its comfortable and lightweight titanium build, with some models featuring well-finished cases and robust ceramic bezels. Reviewers and owners alike highlight the dial's dynamic and shiny appearance, with textured hour markers and high-contrast edges. Accuracy is generally considered good, with figures ranging from +/- 15 seconds per month to within 1/2 second per day, easily corrected by GPS signal. However, some owners note that DST requires manual adjustment and that automatic time syncing depends on proximity to radio wave towers. The price point is a concern for some, who feel it competes with luxury watches without the same aesthetic appeal. One owner pointed out minimal lume and a slight misalignment of the minute hand on their model.

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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)
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Retail MSRP
$2,500
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Alternatives
Case
42mm
Power Reserve
—
Movement
Quartz
Water Resistance
100m
Crystal
Sapphire + AR
01

Case Dimensions

Diameter42mm
Thickness12.4mm
Lug-to-Lug49.5mm
Lug Width14mm
02

Case Build

MaterialTitanium
Water Resistance100m
03

Crystal & Dial

CrystalSapphire
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-dials2
Bezel24-hour (GMT)
Bracelet / strapLug-attached bracelet
HandsBaton
AI-detected from product image · 5/22/2026
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