Side by side

Seiko AstronvsZelos Swordfish 3

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

Astron
SeikoAstron
MSRP $2,400
Swordfish 3
ZelosSwordfish 3
MSRP $399

At a glance

13 of 29 specs differ
Diameter
Astron42mm
Swordfish 340mm
Power Reserve
Astron40h
Swordfish 340h
Water Resistance
Astron100m
Swordfish 3200m
MSRP
Astron$2,400
Swordfish 3$399

Full specifications

Case

6 specs
Category
Dress
Diver
Diameter
42mm
40mm
Lug-to-Lug
47.9mm
40mm
Lug Width
14mm
20mm
Material
Titanium
316L Stainless Steel
Water Resistance
100m
200m

Crystal & Dial

3 specs
AR Coating
Super-clear coating
Inner
Dial Color
Black
Bronze
Lume
LumiBrite on hands and index(es)
None

Movement

3 specs
Caliber
3X62
Seiko NH35
Type
Quartz
Automatic
Jewels
10
25

Pricing

1 specs
MSRP
$2,400
$399

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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 time-telling technology, including GPS and radio wave synchronization, and its self-sufficient solar-powered quartz movement. Owners appreciate the detailed and high-contrast dials, comfortable and lightweight titanium builds, and well-finished cases and bracelets. Some users report excellent accuracy, with one noting +/- 15 seconds per month, while another finds the autonomous movement's accuracy of 1/2 second per day acceptable due to easy correction via GPS sync. However, the Seiko Astron's price point is frequently cited as a drawback, with some finding it high for a quartz watch, particularly when compared to luxury or mechanical alternatives. Specific criticisms include manual DST implementation, the need for outdoor sync, sparse lume, and a minute hand that sits slightly off on one model, with accuracy of +13 sec/month being disappointing for its cost on another.

Zelos Swordfish 3

Owners widely praise the Zelos Swordfish 3 for its strong value, with reviewers highlighting the textured sandwich dial, Seiko NH35 movement, 200m water resistance, and surprisingly good bracelet. The titanium construction is noted for making the watch compact and comfortable, weighing 117g. Some owners find the dimensions fine on paper and based on experience with other models. One reviewer flagged that legibility can suffer in bright light and bracelet edges are sharp. Overall, owners and reviewers rate the Zelos Swordfish 3 highly for its incredible value and fun design, particularly with unique dial options.

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