Side by side

Sternglas KantonvsSeiko Astron

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

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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.

Sternglas Kanton

The Sternglas Kanton is praised for its refined Bauhaus-inspired design, featuring a silver-plated dial and luminous hands and dots for excellent legibility. Owners and reviewers highlight its comfortable 39mm case size, measuring 10mm thick, and the visible STP 1-11 automatic movement through a sapphire crystal case back. Accuracy figures vary, with one source noting +15 seconds per day, while another suggests improved accuracy over previous models. Overall, owners and reviewers rate the Sternglas Kanton highly for its blend of Bauhaus design and Swiss precision at an affordable price point.

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.

From video reviewers

Exceptional accuracy from GPS timekeeping is a key strength. The bracelet's perceived lack of refinement compared to the case finishing is a noted weakness. Reviewers disagreed on the watch's appeal to traditional watchmaking enthusiasts.

At a glance

14 of 29 specs differ
Diameter
Kanton39mm
Astron42mm
Power Reserve
Kanton38h
Astron
Water Resistance
Kanton50m
Astron100m
MSRP
Kanton$971
Astron$2,400

Full specifications

Case

6 specs
Diameter
39mm
42mm
Thickness
10mm
12mm
Lug-to-Lug
45mm
47.9mm
Lug Width
20mm
14mm
Material
Stainless Steel
Titanium
Water Resistance
50m
100m

Crystal & Dial

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

Movement

4 specs
Caliber
Sellita SW200-1
Seiko 3X62
Type
Automatic
Quartz
Power Reserve
38h
0h
Jewels
10

Pricing

1 specs
MSRP
$971
$2,400
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