Side by side

Seiko AstronvsZelos Spearfish 3

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

Astron
SeikoAstron
MSRP $2,200
Spearfish 3
ZelosSpearfish 3
MSRP $749

At a glance

14 of 29 specs differ
Diameter
Astron41.2mm
Spearfish 340mm
Power Reserve
Astron40h
Spearfish 340h
Water Resistance
Astron100m
Spearfish 3200m
MSRP
Astron$2,200
Spearfish 3$749

Full specifications

Case

7 specs
Category
Dress
Diver
Diameter
41.2mm
40mm
Thickness
12mm
11.5mm
Lug-to-Lug
48.5mm
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
Diver - Forged Carbon
Lume
LumiBrite on hands and index(es)
None

Movement

3 specs
Caliber
3X62
La Joux-Perret G100
Type
Quartz
Automatic
Jewels
10
25

Pricing

1 specs
MSRP
$2,200
$749

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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 time-telling technology, GPS time sync, and grab-and-go convenience, with many calling it the best watch they have ever owned. Reviewers and owners highlight the well-managed dial detail, textured hour markers, and high-contrast edges, as well as the well-finished case and bracelet. Some find the lightweight titanium build and quick bracelet adjustment contribute to comfortable wearability. Accuracy is noted as +/- 15 seconds per month without GPS, though the autonomous quartz movement can be easily reset by looking at the sky. Criticisms include DST not being automatically implemented, recessed buttons requiring a sharp object for adjustment, and sparse lume with no 12 o'clock marker. Some owners feel the price point is too expensive for its aesthetic appeal. Overall, owners rate the Seiko Astron highly for its advanced time-telling technology and convenient features.

Zelos Spearfish 3

The Zelos Spearfish 3 is widely praised for its exceptional finishing, with razor-sharp polish and flawless brushed transitions that owners feel exceed its price point. The 40mm case is noted for its wearability, and the La Joux-Perret G100 movement offers a 68-hour power reserve, with reported accuracy averaging +2.6 seconds per day. Reviewers highlight the exceptionally smooth bi-directional bezel and a tool-less micro-adjustment clasp described as best-in-class among microbrands. The sapphire sandwich construction and lumed bezel are also cited as desirable features. Overall, owners and reviewers rate the Zelos Spearfish 3 highly for its outstanding finishing and value at its price point.

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