Side by side

Marathon Arctic OSAR 36mm AutomaticvsSeiko Ice Diver

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
Ice Diver
SeikoIce Diver
MSRP $900

At a glance

12 of 29 specs differ
Diameter
Arctic OSAR 36mm Automatic36mm
Ice Diver45mm
Power Reserve
Arctic OSAR 36mm Automatic40h
Ice Diver70h
Water Resistance
Arctic OSAR 36mm Automatic300m
Ice Diver200m
MSRP
Arctic OSAR 36mm Automatic$1,200
Ice Diver$900

Full specifications

Case

6 specs
Diameter
36mm
45mm
Thickness
13mm
12.9mm
Lug-to-Lug
43.5mm
52.6mm
Lug Width
18mm
20mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
300m
200m

Crystal & Dial

2 specs
Dial Color
White
Black
Lume
None
LumiBrite

Movement

3 specs
Caliber
Sellita SW220-1
6R35
Power Reserve
40h
70h
Jewels
25
24

Pricing

1 specs
MSRP
$1,200
$900

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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.

Seiko Ice Diver

Owners widely praise the Seiko Prospex Sea for its robust build, classic dive watch design, and excellent value, with many highlighting its strong lume and comfortable wearability. Reviewers consistently flag its superior bezel action and overall finishing as standout features for its price point. Some owners find the 43mm case size substantial, with one noting it felt big, thick, and heavy on a 6.5-inch wrist, though others consider it a perfect size. The movement's power reserve is noted as less than newer variants by one reviewer. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its classic design and robust build at an accessible price.

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