Marathon GSAR (Government Search & Rescue) Diver's AutomaticvsMarnaut Safe Harbour 100
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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.

GSAR (Government Search & Rescue) Diver's Automatic

Safe Harbour 100
Diameter
41mm
39mm
Lug-to-Lug
48mm
45mm
lowest
Thickness
14mm
13mm
lowest
Water Resistance
300m
highest
100m
Power Reserve
n/a
41h
MSRP
$2,500
$1,042
lowest
Movement
Sellita SW200-1
Sellita SW200-1
Case
5 specsCrystal & Dial
2 specsMovement
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Marathon GSAR (Government Search & Rescue) Diver's Automatic is widely praised as a versatile and well-made tool watch, with reviewers highlighting its legibility, utilitarian build, and comfort. Owners appreciate the tritium gas tubes for exceptional illumination in darkness, a feature noted as superior to some alternatives. The 41mm case size is considered ideal by some, though one owner found it wore tall and bumped on objects. While the watch is generally seen as a solid value for a Swiss-made tool watch, some owners have reported quality control issues requiring warranty service. Overall, owners and reviewers rate the Marathon GSAR (Government Search & Rescue) Diver's Automatic highly for its robust build and constant legibility from tritium.
Owners widely praise the Marnaut Safe Harbour 100 for its value at EUR 549, noting the 2-year warranty and Italian leather strap. Reviewers highlight its divisive but fresh sea urchin-inspired dial and 39mm GADA-friendly case size, though one reviewer found the handset could get lost on the busy dial. The tonneau case, despite a 13.2mm thickness, wears well due to its curved mid-case and domed sapphire crystal. On balance, owners and reviewers rate the Marnaut Safe Harbour 100 highly for its unique design and strong value proposition within the microbrand segment.
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