Side by side

Marathon Arctic OSAR 41mm AutomaticvsZelos Helica Moonphase

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Arctic OSAR 41mm Automatic
MarathonArctic OSAR 41mm Automatic
MSRP $1,800
Helica Moonphase
ZelosHelica Moonphase
MSRP $1,049

At a glance

9 of 29 specs differ
Diameter
Arctic OSAR 41mm Automatic41mm
Helica Moonphase39mm
Power Reserve
Arctic OSAR 41mm Automatic40h
Helica Moonphase40h
Water Resistance
Arctic OSAR 41mm Automatic300m
Helica Moonphase100m
MSRP
Arctic OSAR 41mm Automatic$1,800
Helica Moonphase$1,049

Full specifications

Case

6 specs
Category
Diver
Moonphase
Diameter
41mm
39mm
Thickness
13mm
10mm
Lug-to-Lug
43.5mm
39mm
Lug Width
18mm
20mm
Water Resistance
300m
100m

Crystal & Dial

1 specs
Dial Color
White
Meteorite

Movement

1 specs
Caliber
Sellita SW220-1
Sellita SW288 Moonphase

Pricing

1 specs
MSRP
$1,800
$1,049

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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 41mm Automatic

The Marathon Arctic OSAR 41mm Automatic is noted for its comfortable wearability on wrists under 7 inches, with one owner finding the 41mm size perfect. Accuracy observations vary, with one owner reporting a consistent +1 second per day and another noting -20 seconds per day. The watch features a Sellita automatic movement and has dimensions of 14mm thickness and a 48mm lug-to-lug. Overall, owners appreciate the Marathon Arctic OSAR 41mm Automatic for its comfortable fit and Marathon's overall appeal.

Zelos Helica Moonphase

Owners widely praise the Zelos Helica Moonphase for its gorgeous aventurine dial, unique industrial-dress aesthetic, and comfortable wearability, with one owner calling it spectacular and another their favorite Zelos. The moonphase complication is frequently highlighted as beautiful, though some find the double moon distracting or the dial cluttered. A manual-wind movement combined with a screw-down crown is noted as a drawback by some, requiring adjustment and potentially feeling fragile when fully wound, while one owner reports a 43-hour power reserve. On balance, owners rate the Zelos Helica Moonphase highly for its stunning aventurine dial and unique design at its price point.

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