Marathon Arctic OSAR 46mm AutomaticvsMerkur MONOBLOCK TUNA

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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

Merkur MONOBLOCK TUNA at true scale

MONOBLOCK TUNA

Diameter

46mm

47mm

Lug-to-Lug

n/a

48mm

Thickness

13mm

lowest

17mm

Water Resistance

300m

highest

200m

Power Reserve

n/a

40h

MSRP

$2,500

$279

lowest

Movement

Sellita SW220-1

Seiko NH35

Case

6 specs
Diameter
46mm
47mm
Thickness
13mm
17mm
Lug-to-Lug
n/a
48mm
Lug Width
18mm
20mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
300m
200m

Crystal & Dial

1 specs
Dial Color
White
n/a

Movement

2 specs
Caliber
Sellita SW220-1
Seiko NH35
Power Reserve
0h
40h

Pricing

1 specs
MSRP
$2,500
$279
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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.

Merkur MONOBLOCK TUNA

Merkur MONOBLOCK TUNA owners widely praise its excellent finishing, often noting it surpasses typical examples, and appreciate the tactile, satisfying 60-click bezel action on the titanium case. The watch is described as robust, handling snow exposure and submersion well, with reliable performance and accuracy around +2 to +3 seconds per day. Some owners highlight the monoblock case construction and sapphire bezel insert options, while others enjoy the beautiful color and killer styling on an oyster bracelet. The quality is considered surprisingly good for the price. On balance, owners rate the Merkur MONOBLOCK TUNA highly for its exceptional finishing and reliable performance at its price point.

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