Side by side

Marathon Arctic OSAR 36mm AutomaticvsHalios Seaforth IV

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Arctic OSAR 36mm Automatic
MarathonArctic OSAR 36mm Automatic
MSRP $1,200
Seaforth IV
HaliosSeaforth IV
MSRP $765

At a glance

10 of 29 specs differ
Diameter
Arctic OSAR 36mm Automatic36mm
Seaforth IV40mm
Power Reserve
Arctic OSAR 36mm Automatic40h
Seaforth IV40h
Water Resistance
Arctic OSAR 36mm Automatic300m
Seaforth IV200m
MSRP
Arctic OSAR 36mm Automatic$1,200
Seaforth IV$765

Full specifications

Case

6 specs
Diameter
36mm
40mm
Thickness
13mm
12.4mm
Lug-to-Lug
43.5mm
46.5mm
Lug Width
18mm
20mm
Material
316L Stainless Steel
Titanium
Water Resistance
300m
200m

Crystal & Dial

2 specs
Crystal
Sapphire
Sapphire (double-domed)
Dial Color
White
Blue

Movement

1 specs
Caliber
Sellita SW220-1
Sellita SW200-2

Pricing

1 specs
MSRP
$1,200
$765

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Marathon Arctic OSAR 36mm Automatic

The Marathon Arctic OSAR 36mm Automatic is noted for its non-tritium dial option, though some owners prefer the 1-12 numeral layout found on other models. One owner found the 36mm size too small for their wrist. Overall, owners appreciate the Marathon Arctic OSAR 36mm Automatic for its non-tritium dial option.

Halios Seaforth IV

Owners widely praise the Halios Sunburst Blue for its perfect 40mm size, stunning sunburst dial, and excellent lume, with one owner calling it Halios's best effort and a potential "Omega AT killer." The ETA 2824 movement is noted as running smoothly, and the watch is considered a great value with strong resale. Some owners desire larger sizes or different dial colors, and one reviewer found the Sinn 556i more versatile. The sapphire bezel is described as tall and flat, which is a point of contention for some. Overall, owners rate the Halios Sunburst Blue highly for its design, size, and value.

From video reviewers

The sunburst blue dial is a standout feature. Limited water resistance is a shared concern.

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