Side by side

Marathon Arctic OSAR 36mm AutomaticvsSeiko Prospex LX line

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
Prospex LX line
SeikoProspex LX line
MSRP $5,500

At a glance

15 of 29 specs differ
Diameter
Arctic OSAR 36mm Automatic36mm
Prospex LX line44.8mm
Power Reserve
Arctic OSAR 36mm Automatic40h
Prospex LX line72h
Water Resistance
Arctic OSAR 36mm Automatic300m
Prospex LX line200m
MSRP
Arctic OSAR 36mm Automatic$1,200
Prospex LX line$5,500

Full specifications

Case

7 specs
Category
Diver
GMT
Diameter
36mm
44.8mm
Thickness
13mm
14.7mm
Lug-to-Lug
43.5mm
50.9mm
Lug Width
18mm
22mm
Material
316L Stainless Steel
Titanium
Water Resistance
300m
200m

Crystal & Dial

3 specs
AR Coating
Inner
Super-clear coating
Dial Color
White
Black
Lume
None
LumiBrite on hands and index(es)

Movement

4 specs
Caliber
Sellita SW220-1
5R66
Type
Automatic
Spring Drive
Power Reserve
40h
72h
Jewels
25
30

Pricing

1 specs
MSRP
$1,200
$5,500

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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 Prospex LX line

Owners widely report the dial's blue-green sunburst is phenomenal, and the sapphire glass features blue AR coating. Some owners feel the high price limits discounts and sales, with one AD noting extremely low sales due to the cost. One owner reported DLC peeling off a two-week-old watch, and another noted quality control issues like bezel inserts and fallen second hands. On balance, owners consider the Seiko Prospex LX line a nicely built watch, though pricing led to poor sales and its discontinuation.

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