Marathon Steel Navigator SSNAV AutovsStraum Opphav Black
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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.

Steel Navigator SSNAV Auto

Opphav Black
Diameter
41mm
41mm
Lug-to-Lug
48mm
46.6mm
lowest
Thickness
11.5mm
11.1mm
lowest
Water Resistance
60m
100m
highest
Power Reserve
n/a
38h
MSRP
$1,300
$900
lowest
Movement
Sellita SW200-1
Sellita SW200-1
Case
6 specsMovement
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Marathon Steel Navigator SSNAV Auto for its rugged, tank-like build and comfortable wearability, with many highlighting its bright tritium lume for excellent low-light visibility. The watch is also noted for its accuracy and value as a tool watch with aviation history. Some owners find the watch runs a bit small, and one owner of a sibling model noted it as thicker and heavier than other Navigator models. The Marathon Steel Navigator SSNAV Auto features a 41mm steel case, sapphire crystal, and a bi-directional bezel. Overall, owners rate the Marathon Steel Navigator SSNAV Auto highly for its robust construction and excellent low-light legibility at the price.
The Straum Opphav Black is widely praised for its exceptional dial design, with owners and reviewers highlighting its unique, nature-inspired colors and dramatic, textured surfaces that create a floating dial effect. The finishing on the dial and case is consistently described as high quality, with some owners feeling it rivals watches costing significantly more. The bracelet also receives positive remarks for its build and design, though one owner found the clasp development lagged behind. Some owners note that the crown guards can slightly impede winding, but this is generally considered a minor issue easily overcome by shaking the watch. Opinions are mixed on the dial color, with one owner finding the green less appealing than pictured, and another finds the proportions awkward due to the wide case and short lug-to-lug distance. Overall, owners and reviewers rate the Straum Opphav Black highly for its impressive dial and case finishing at its price point.
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