Side by side

Seiko Astron GPS Solar 2025 Limited EditionvsZelos Swordfish 3

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

Astron GPS Solar 2025 Limited Edition
SeikoAstron GPS Solar 2025 Limited Edition
MSRP $2,600
Swordfish 3
ZelosSwordfish 3
MSRP $399

At a glance

13 of 29 specs differ
Diameter
Astron GPS Solar 2025 Limited Edition42mm
Swordfish 340mm
Power Reserve
Astron GPS Solar 2025 Limited Edition40h
Swordfish 340h
Water Resistance
Astron GPS Solar 2025 Limited Edition100m
Swordfish 3200m
MSRP
Astron GPS Solar 2025 Limited Edition$2,600
Swordfish 3$399

Full specifications

Case

6 specs
Category
GMT
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
$2,600
$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 GPS Solar 2025 Limited Edition

The Seiko Astron GPS Solar 2025 Limited Edition is widely praised for its advanced GPS time and date adjustment capabilities, powered by light to eliminate battery changes. Owners and reviewers highlight its impressive accuracy and the convenience of automatic time zone updates, with some specifically commending the wearability of the 39mm size and its clean, simple design. However, reception of the GPS signal requires an unobstructed view of the sky, and manual time zone adjustments are necessary for Daylight Saving Time on some variants. One owner notes a slight imperfection in chapter ring alignment on the 39mm model. On balance, owners and reviewers rate the Seiko Astron GPS Solar 2025 Limited Edition highly for its satellite-powered timekeeping and improved wearability in the 39mm configuration.

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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