Side by side

Marathon OSAR-D (Original SAR with Date) Automatic 36mmvsTudor Black Bay One 31 S&G

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

OSAR-D (Original SAR with Date) Automatic 36mm
MarathonOSAR-D (Original SAR with Date) Automatic 36mm
MSRP $1,200
Black Bay One 31 S&G
TudorBlack Bay One 31 S&G
MSRP $6,850

At a glance

12 of 29 specs differ
Diameter
OSAR-D (Original SAR with Date) Automatic 36mm36mm
Black Bay One 31 S&G31mm
Power Reserve
OSAR-D (Original SAR with Date) Automatic 36mm40h
Black Bay One 31 S&G50h
Water Resistance
OSAR-D (Original SAR with Date) Automatic 36mm300m
Black Bay One 31 S&G100m
MSRP
OSAR-D (Original SAR with Date) Automatic 36mm$1,200
Black Bay One 31 S&G$6,850

Full specifications

Case

9 specs
Category
Diver
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

Movement

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

Pricing

1 specs
MSRP
$1,200
$6,850

Follow this matchup

Get a note when Marathon OSAR-D (Original SAR with Date) Automatic 36mm vs Tudor Black Bay One 31 S&G gets more votes, a community discussion, or a price drop. No account needed.

What people say

Owners + reviewers, side by side

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

Marathon OSAR-D (Original SAR with Date) Automatic 36mm

Owners widely praise the Marathon OSAR-D (Original SAR with Date) Automatic 36mm for its exceptional legibility, featuring large hour markers and MaraGlo lume. The watch is noted for its comfortable wearability and competent Swiss-made Selitta SW200-1 automatic movement, offering 300-meter water resistance and a sapphire crystal. Some enthusiasts find the price of $1,380 USD on rubber to be excessive, particularly compared to past models or other brands, and the Spartan bracelet is described as lacking refinement. On balance, owners and reviewers find the Marathon OSAR-D Automatic 36mm a reliable and functional tool watch, with its clear dial and robust build being the primary draws.

Tudor Black Bay One 31 S&G

The Tudor Black Bay One 31 S&G is praised for its quiet luxury, combining brushed steel and warm gold accents for understated charm. Owners appreciate the brushed gold for a casual two-tone look and the champagne dial's surprising legibility. Some find the case sides too thick, and one user expressed a desire for a smaller S&G variant. The watch features the MT5612 movement with a 70-hour power reserve and a date function, within a 200-meter water-resistant case. Overall, owners and reviewers highlight the Tudor Black Bay One 31 S&G's balanced two-tone aesthetic as its primary appeal.

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.