Side by side

Marathon Arctic OSAR 36mm AutomaticvsSeiko King Seiko KSK

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
King Seiko KSK
SeikoKing Seiko KSK
MSRP $3,300

At a glance

14 of 29 specs differ
Diameter
Arctic OSAR 36mm Automatic36mm
King Seiko KSK38.6mm
Power Reserve
Arctic OSAR 36mm Automatic40h
King Seiko KSK45h
Water Resistance
Arctic OSAR 36mm Automatic300m
King Seiko KSK50m
MSRP
Arctic OSAR 36mm Automatic$1,200
King Seiko KSK$3,300

Full specifications

Case

7 specs
Category
Diver
Dress
Diameter
36mm
38.6mm
Thickness
13mm
10.7mm
Lug-to-Lug
43.5mm
45.8mm
Lug Width
18mm
19mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
300m
50m

Crystal & Dial

3 specs
Crystal Shape
Flat
Box
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
White
Black

Movement

3 specs
Caliber
Sellita SW220-1
6L35
Power Reserve
40h
45h
Jewels
25
26

Pricing

1 specs
MSRP
$1,200
$3,300

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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 King Seiko KSK

Owners and reviewers widely praise the King Seiko KSK for its exceptional dial and case finishing, often compared to higher-end brands, and its slim, retro design. The use of the Calibre 6L35 movement in some variants is seen as a significant upgrade, contributing to a refined feel, while others note the bracelet is unusually nice and the case offers a mix of brushed and polished finishes with sharp angles. However, some owners question the value proposition, citing misaligned screws and clasp components on their examples, and the standard 6R movement in some models is criticized as a disappointment for the price point. Accuracy figures range from +15/-10 seconds per day to +5 to +7 seconds per day, and water resistance is rated at 5 BAR or 50 meters. Overall, owners and reviewers find the King Seiko KSK to be a beautiful and classy watch with fantastic finishing, though some are divided on its value and movement choice at its price point.

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