Side by side

Marathon OSAR-D (Original SAR with Date) Automatic 41mmvsTudor 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 41mm
MarathonOSAR-D (Original SAR with Date) Automatic 41mm
MSRP $1,800
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 41mm41mm
Black Bay One 31 S&G31mm
Power Reserve
OSAR-D (Original SAR with Date) Automatic 41mm40h
Black Bay One 31 S&G50h
Water Resistance
OSAR-D (Original SAR with Date) Automatic 41mm300m
Black Bay One 31 S&G100m
MSRP
OSAR-D (Original SAR with Date) Automatic 41mm$1,800
Black Bay One 31 S&G$6,850

Full specifications

Case

9 specs
Category
Diver
Diameter
41mm
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
$1,800
$6,850

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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 OSAR-D (Original SAR with Date) Automatic 41mm

The Marathon OSAR-D (Original SAR with Date) Automatic 41mm is noted for its highly legible white dial with applied hour markers and a functional date magnifier, emphasizing its tool-watch purpose. Its Swiss-made Sellita SW200-1 movement is considered reliable and serviceable. One reviewer found the bracelet lacked refinement and preferred the rubber strap option. Overall, owners and reviewers appreciate the Marathon OSAR-D (Original SAR with Date) Automatic 41mm for its excellent legibility and robust movement.

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.

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