Marathon Arctic OSAR 36mm AutomaticvsSeiko Prospex Sea
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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.
Arctic OSAR 36mm Automatic
Prospex Sea
Diameter
36mm
41mm
Lug-to-Lug
43.5mm
lowest
46.9mm
Thickness
13mm
12.3mm
lowest
Water Resistance
300m
highest
200m
Power Reserve
n/a
70h
MSRP
$1,200
$900
lowest
Movement
Sellita SW220-1
Seiko 6R35
Case
6 specsCrystal & Dial
4 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Marathon Arctic OSAR 36mm Automatic for its tough, reliable feel and looks, with tritium tubes considered an exotic plus for visibility. The 36mm size is noted as a budget-conscious choice for smaller wrists, fitting well on sub-7-inch wrists, though one owner found the size too small and another is still getting used to it. The watch is described as a purpose-built tool watch, not designed for versatility with suits, but rather for singular focus on usefulness and durability. Overall, owners and reviewers rate the Marathon Arctic OSAR 36mm Automatic highly for its durable tool-watch nature and useful tritium illumination.
Owners widely praise the Seiko Prospex Sea for its value and robust build, with many highlighting its excellent lume and attractive design. Some owners find the 41mm case size perfect, while others with smaller wrists consider it too large, thick, and heavy. The stock rubber strap is noted as uncomfortable for land wear by one owner. Overall, owners rate the Seiko Prospex Sea highly for its design and value at the price point.
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