Side by side

Marathon MSAR (Medium Search & Rescue) Diver's AutomaticvsTudor Black Bay 58 Bronze

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

MSAR (Medium Search & Rescue) Diver's Automatic
MarathonMSAR (Medium Search & Rescue) Diver's Automatic
MSRP $1,800
Black Bay 58 Bronze
TudorBlack Bay 58 Bronze
MSRP $5,850

At a glance

18 of 29 specs differ
Diameter
MSAR (Medium Search & Rescue) Diver's Automatic36mm
Black Bay 58 Bronze39mm
Power Reserve
MSAR (Medium Search & Rescue) Diver's Automatic40h
Black Bay 58 Bronze70h
Water Resistance
MSAR (Medium Search & Rescue) Diver's Automatic300m
Black Bay 58 Bronze200m
MSRP
MSAR (Medium Search & Rescue) Diver's Automatic$1,800
Black Bay 58 Bronze$5,850

Full specifications

Case

8 specs
Diameter
36mm
39mm
Thickness
18mm
11.9mm
Lug-to-Lug
46mm
Lug Width
18mm
20mm
Material
316L Stainless Steel
Bronze
Finish
Brushed and polished
Brushed + Satin
Water Resistance
300m
200m
Caseback
Solid
Engraved

Crystal & Dial

3 specs
Crystal Shape
Flat
AR Coating
Inner
Dial Color
White
Black

Movement

6 specs
Caliber
Sellita SW200-1
MT5400
Beat Rate
28,800 vph
0 vph
Power Reserve
40h
70h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No

Pricing

1 specs
MSRP
$1,800
$5,850

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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 MSAR (Medium Search & Rescue) Diver's Automatic

The Marathon MSAR (Medium Search & Rescue) Diver's Automatic is lauded for its utilitarian, no-nonsense design, exceptional tritium lume for visibility, and comfortable 41mm wearability. Reviewers highlight its robust build, meeting ISO 6425 dive watch standards and approved for military use, demonstrating durability during demanding activities. One reviewer notes the stock rubber strap requires modification for a proper fit. Overall, reviewers rate the Marathon MSAR (Medium Search & Rescue) Diver's Automatic highly for its focus on utility and ruggedness at its price point.

Tudor Black Bay 58 Bronze

The Tudor Black Bay 58 Bronze is widely praised for its unique, evolving aesthetic driven by its developing bronze patina, which owners describe as an incremental pleasure and a conversation starter. Reviewers highlight its warm, vintage feel, achieved through the aging bronze case, root-beer brown bezel, and rose gold-toned dive scale, complemented by applied Arabic numerals on a 39mm case. The MT5400 movement is noted for its 70-hour power reserve and COSC-certified accuracy, with one owner reporting a net loss of about one second every three days. The bezel action is described as firm and reassuring, tighter than steel Black Bay models. Owners report the watch wears well dressed up or down, and its finishing is favorably compared to higher-end brands. However, some owners note the soft bronze case scratches easily and can cause blueing on the wrist in hot weather.

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