Luminox Master Carbon SEAL Automatic 45mmvsMarathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic

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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.

Master Carbon SEAL Automatic 45mm

JDD (Jumbo Day/Date) Anthracite Diver's Automatic
Diameter
45mm
46mm
Lug-to-Lug
n/a
55mm
Thickness
14mm
lowest
18mm
Water Resistance
200m
300m
highest
MSRP
$1,695
lowest
$3,250
Movement
Sellita SW220-1
Sellita SW220-1
Case
6 specsCrystal & Dial
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Luminox Master Carbon SEAL Automatic 45mm for its lightweight and scratch-resistant Carbonox case, which has held up well to extreme activities, and appreciate the constant lume from its tritium tubes. However, some owners report issues with the bezel rattling and have observed multiple instances of sheared lugs on the watch. One reviewer noted the rubber strap requires precise cutting and the deployant hardware is mismatched. The Luminox Master Carbon SEAL Automatic 45mm is available on a red strap, with a black strap also offered. On balance, owners value the Luminox Master Carbon SEAL Automatic 45mm for its durable, lightweight carbon case and reliable tritium lume, despite some concerns about build quality and strap design.
The Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic is widely praised as a tough, underrated tool watch with excellent legibility due to its tritium lume. Owners appreciate its robust build and lifestyle appeal, though its 46mm size is a common point of criticism, with some finding it heavy and top-heavy. One reviewer noted the white day/date discs clash with the anthracite dial, and an owner observed the watch running about 10 seconds fast over three days. On balance, owners and reviewers rate the Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic highly for its robust build and excellent legibility as a tool watch, despite its substantial size.
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