Chronotechna SeaQuest DivevsMarathon GSAR (Government Search & Rescue) 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.

SeaQuest Dive

GSAR (Government Search & Rescue) Diver's Automatic
Diameter
42mm
41mm
Lug-to-Lug
47.7mm
lowest
48mm
Thickness
12.4mm
lowest
14mm
Water Resistance
300m
300m
Power Reserve
41h
n/a
MSRP
n/a
$2,500
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 Chronotechna SeaQuest Dive is commended for its distinctive "blackest black" dial, achieved with Musou paint for striking contrast, and its minimalist design that sidesteps common diver watch clichés. The watch is equipped with a Sellita SW200-1 automatic movement, a 42mm steel case featuring both brushed and polished finishes, a unidirectional ceramic bezel, and 300m water resistance. However, one owner notes that the cut-out edges of the sandwich dial appear rough, suggesting potential quality control issues with dial finishing. Overall, owners and reviewers appreciate the Chronotechna SeaQuest Dive for its unique dial and design, despite some concerns about dial finishing.
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.
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