Side by side

Seiko AstronvsZelos Great White 43

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Astron
SeikoAstron
MSRP $2,700
Great White 43
ZelosGreat White 43
MSRP $599

At a glance

15 of 29 specs differ
Diameter
Astron43.3mm
Great White 4343mm
Power Reserve
Astron40h
Great White 4340h
Water Resistance
Astron100m
Great White 43300m
MSRP
Astron$2,700
Great White 43$599

Full specifications

Case

7 specs
Category
Chronograph
Diver
Diameter
43.3mm
43mm
Thickness
13.4mm
12mm
Lug-to-Lug
49.5mm
43mm
Lug Width
14mm
22mm
Material
Titanium
Titanium (DLC coated)
Water Resistance
100m
300m

Crystal & Dial

4 specs
Crystal Shape
Curved
Flat
AR Coating
Super-clear coating
Inner
Dial Color
Black
Blue
Lume
LumiBrite on hands and index(es)
None

Movement

3 specs
Caliber
5X83
Miyota 9015
Type
Quartz
Automatic
Jewels
14
25

Pricing

1 specs
MSRP
$2,700
$599

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Seiko Astron

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.

From video reviewers

The watch's automatic time zone adjustment via GPS is a notable feature. The watch's solar-powered charging system can take up to 6 months to fully charge, which may not be ideal for users who need a quick power boost.

Zelos Great White 43

Owners widely praise the Zelos Great White 43's "unbelievable" and "amazing" lume, particularly on the carbon and Frost variants. The Miyota 9015 movement and 300m water resistance are noted features. Some owners find the 43mm size large, while others report it wears well. Opinions are divided on colorways, with some disappointed by the absence of a "Nebula" option and others finding the "Arctic" version striking. Overall, owners rate the Zelos Great White 43 highly for its exceptional lume and robust specifications at the price point.

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