Side by side

Seiko AstronvsZelos Hammerhead V3 300m Bronze

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

Astron
SeikoAstron
MSRP $2,400
Hammerhead V3 300m Bronze
ZelosHammerhead V3 300m Bronze
MSRP $449

At a glance

14 of 29 specs differ
Diameter
Astron42mm
Hammerhead V3 300m Bronze44mm
Power Reserve
Astron40h
Hammerhead V3 300m Bronze40h
Water Resistance
Astron100m
Hammerhead V3 300m Bronze300m
MSRP
Astron$2,400
Hammerhead V3 300m Bronze$449

Full specifications

Case

6 specs
Category
Dress
Diver
Diameter
42mm
44mm
Thickness
12mm
13mm
Lug-to-Lug
47.9mm
44mm
Lug Width
14mm
22mm
Water Resistance
100m
300m

Crystal & Dial

4 specs
Crystal
Sapphire
Domed Sapphire
AR Coating
Super-clear coating
Inner
Dial Color
Black
Bronze - Frost
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
$449

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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 Hammerhead V3 300m Bronze

Owners widely praise the Zelos Hammerhead V3 300m Bronze for its distinctive 70s-inspired design, slim 13.5mm case, and improved lume, offering a sophisticated timepiece at an accessible price point starting at $349. The unique dial is noted for evoking an otherworldly feeling, and the comfortable bracelet features on-the-fly micro-adjustment. Some enthusiasts express frustration with shipping delays and a desire to see the watch on a wrist before purchase. One owner flags that the clasp material could be more scratch-resistant, and resizing bracelet pins can be stubborn. On balance, owners rate the Zelos Hammerhead V3 300m Bronze highly for its unique design and build quality at its price point.

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