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 $2,500
Swordfish 3
ZelosSwordfish 3
MSRP $399

At a glance

14 of 29 specs differ
Diameter
Astron42mm
Swordfish 340mm
Power Reserve
Astron40h
Swordfish 340h
Water Resistance
Astron100m
Swordfish 3200m
MSRP
Astron$2,500
Swordfish 3$399

Full specifications

Case

7 specs
Category
GMT
Diver
Diameter
42mm
40mm
Thickness
12.4mm
12mm
Lug-to-Lug
49.5mm
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
5X83
Seiko NH35
Type
Quartz
Automatic
Jewels
14
25

Pricing

1 specs
MSRP
$2,500
$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

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.

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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