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Seiko Astron
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Seiko Astron

Chronograph

The Seiko Astron is widely praised for its advanced timekeeping technology, including GPS and radio wave synchronization, offering grab-and-go convenience and exceptional accuracy, with some users reporting +/- 15 seconds per month or even 1/2 second per day for its autonomous quartz movement. Owners appreciate its well-finished titanium cases and bracelets, detailed dials with high-contrast markers, and lightweight, comfortable wearability. However, some find the price point of around $2,000 to $2,400 expensive, noting that GPS sync works best outdoors and that certain models lack screw-down casebacks, impacting water resistance. The lume is described as sparse on some models, and recessed buttons require tools to operate. Overall, owners and reviewers rate the Seiko Astron highly for its cutting-edge technology and comfortable, well-finished design, with the value proposition becoming more compelling when models are found at a discount.

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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
4 Variants
Lume:LumiBrite on hands and index(es)
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Retail MSRP
$2,700
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Alternatives
Case
43.3mm
Power Reserve
—
Movement
Quartz
Water Resistance
100m
Crystal
Sapphire + AR
01

Case Dimensions

Diameter43.3mm
Thickness13.4mm
Lug-to-Lug49.5mm
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-dials2
BezelFixed
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 43.3mm titanium case, 13.4mm thick, powered by the 5X83 movement. Water resistance is rated to 100m, under a sapphire crystal. Manufacturer MSRP is $2,700.

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