Side by side

Marathon Arctic OSAR 36mm AutomaticvsTudor Black Bay One 31

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
Black Bay One 31
TudorBlack Bay One 31
MSRP $4,600

At a glance

12 of 29 specs differ
Diameter
Arctic OSAR 36mm Automatic36mm
Black Bay One 3131mm
Power Reserve
Arctic OSAR 36mm Automatic40h
Black Bay One 3150h
Water Resistance
Arctic OSAR 36mm Automatic300m
Black Bay One 31100m
MSRP
Arctic OSAR 36mm Automatic$1,200
Black Bay One 31$4,600

Full specifications

Case

8 specs
Diameter
36mm
31mm
Thickness
13mm
9.5mm
Lug-to-Lug
43.5mm
46mm
Lug Width
18mm
17mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed and polished
Polished + Satin
Water Resistance
300m
100m
Caseback
Solid
Solid screw-down

Crystal & Dial

1 specs
Dial Color
White
Anthracite

Movement

2 specs
Caliber
Sellita SW220-1
MT5201
Power Reserve
40h
50h

Pricing

1 specs
MSRP
$1,200
$4,600

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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.

Tudor Black Bay One 31

Owners widely report the Tudor Black Bay One 31's polished case and bracelet scratch easily, though its wearability under gloves and robust movement are praised. Some desire more micro-adjustment options on the clasp, and a lack of contrast between the silver dial and hands is noted. The 31mm size may be a consideration for daily wear due to its 50-hour power reserve. On balance, owners and reviewers appreciate the Tudor Black Bay One 31 for its comfortable wearability and robust movement, despite concerns about case scratching and clasp adjustability.

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