Marathon Arctic OSAR 46mm AutomaticvsSeiko Prospex Marinemaster Seiko Diver’s Watch 60th Anniversary Limited Edition

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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.

Marathon Arctic OSAR 46mm Automatic at true scale

Arctic OSAR 46mm Automatic

Seiko Prospex Marinemaster Seiko Diver’s Watch 60th Anniversary Limited Edition at true scale

Prospex Marinemaster Seiko Diver’s Watch 60th Anniversary Limited Edition

Diameter

46mm

45.4mm

Lug-to-Lug

n/a

50.4mm

Thickness

13mm

lowest

16mm

Water Resistance

300m

600m

highest

Power Reserve

n/a

72h

MSRP

$2,500

lowest

$4,600

Movement

Sellita SW220-1

Seiko 8L45

Case

6 specs
Diameter
46mm
45.4mm
Thickness
13mm
16mm
Lug-to-Lug
n/a
50.4mm
Lug Width
18mm
22mm
Material
316L Stainless Steel
Titanium
Water Resistance
300m
600m

Crystal & Dial

4 specs
Crystal Shape
n/a
Curved
AR Coating
n/a
Anti-reflective coating on inner surface
Dial Color
White
n/a
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Sellita SW220-1
Seiko 8L45
Power Reserve
0h
72h
Jewels
0
35

Pricing

1 specs
MSRP
$2,500
$4,600
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Reviews

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

Marathon Arctic OSAR 46mm Automatic

Owners praise the Marathon Arctic OSAR 46mm Automatic for its overbuilt toughness and industrial, instrument-like aesthetic, with some preferring the Arctic dial for legibility. One owner notes the MaraGlo luminous paint is likened to sliced eggs. The watch features a Swiss automatic movement and 300M ISO-rated water resistance. Some owners question its rising price and luxury positioning, with one noting poor lume and movement performance. Overall, owners rate the Marathon Arctic OSAR 46mm Automatic highly for its rugged, tool-watch build and legibility.

Seiko Prospex Marinemaster Seiko Diver’s Watch 60th Anniversary Limited Edition

Owners widely praise the Seiko Prospex Marinemaster Seiko Diver’s Watch 60th Anniversary Limited Edition's dial, particularly its blue gradient, and the comfortable titanium monobloc case construction. Some enthusiasts appreciate the tool watch aesthetic and bracelet design. However, a significant number of owners and reviewers note that the 45.4mm diameter and 16mm thickness can be overwhelming, with some finding the dial too crowded with text and logos. There is also criticism regarding the watch's high price point. On balance, owners and reviewers rate the Seiko Prospex Marinemaster Seiko Diver’s Watch 60th Anniversary Limited Edition highly for its unique dial and comfortable titanium case, despite concerns about its size and value proposition.

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