Marathon GSAR (Government Search & Rescue) Diver's AutomaticvsMarnaut Safe Harbour 100C Safe Harbour Classic 100 (cushion case, multi-subdial complication, applied batons)
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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 100C Safe Harbour Classic 100 (cushion case, multi-subdial complication, applied batons)
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
1 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.
The Marnaut Safe Harbour 100C Safe Harbour Classic 100 (cushion case, multi-subdial complication, applied batons) is praised for its well-executed finishing, signed crown, and domed sapphire crystal. Owners note the 39mm tonneau case is ideal for everyday wear, though its 13.2mm thickness is somewhat concealed by the curved mid-case and sapphire crystal. The glossy lacquered dial with applied indices is a point of discussion, with some finding the busy design and slender handset can make legibility challenging. The initial stiffness of the faux-croc leather strap is noted, but the 20mm lug width allows for easy customization. On balance, owners and reviewers appreciate the Marnaut Safe Harbour 100C Safe Harbour Classic 100 (cushion case, multi-subdial complication, applied batons) for its robust build quality and comfortable wearability at its price point.
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