A-13A A-13AvsMarathon CeraShell Pilot's Navigator
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

A-13A

CeraShell Pilot's Navigator
Diameter
42mm
41mm
Lug-to-Lug
50.8mm
48mm
lowest
Thickness
13.4mm
11.5mm
lowest
Water Resistance
100m
highest
60m
MSRP
n/a
$550
Movement
ETA 251.264
ETA F06
Case
5 specsCrystal & Dial
1 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The A-13A is praised for its central minutes register, offering an intuitive way to read accumulated minutes, drawing inspiration from vintage movements. Its pilot-inspired design, referencing the A-13A cockpit clock, contributes to exceptional readability. The brushed finish and curved lugs help mitigate perceived bulk. On balance, owners and reviewers rate the A-13A highly for its clear dial layout and pilot aesthetic.
Owners widely praise the Marathon CeraShell Pilot's Navigator for its crisp look, white markings, and tritium lume, with many finding it a compelling choice and an excellent continuation of the original design. Reviewers highlight its highly accurate ETA F06 quartz movement, rated to ±10 seconds per year, and the comfortable 41mm case. Some community members expressed disappointment with the $800 price point and the inclusion of a date window, while one owner noted significant play in the bezel. On balance, owners and reviewers rate the Marathon CeraShell Pilot's Navigator highly for its accuracy and tritium lume at the price.
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