Side by side

Marathon MSAR (Medium Search & Rescue) Diver's AutomaticvsSeiko Prospex Sea

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
Prospex Sea
SeikoProspex Sea
MSRP $595

At a glance

13 of 29 specs differ
Diameter
MSAR (Medium Search & Rescue) Diver's Automatic36mm
Prospex Sea41.7mm
Power Reserve
MSAR (Medium Search & Rescue) Diver's Automatic40h
Prospex Sea41h
Water Resistance
MSAR (Medium Search & Rescue) Diver's Automatic300m
Prospex Sea200m
MSRP
MSAR (Medium Search & Rescue) Diver's Automatic$1,800
Prospex Sea$595

Full specifications

Case

6 specs
Diameter
36mm
41.7mm
Thickness
18mm
12.3mm
Lug-to-Lug
49.5mm
Lug Width
18mm
20mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
300m
200m

Crystal & Dial

3 specs
Crystal
Sapphire
Hardlex
Dial Color
White
Black
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Sellita SW200-1
4R35
Power Reserve
40h
41h
Jewels
25
23

Pricing

1 specs
MSRP
$1,800
$595

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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.

Seiko Prospex Sea

Owners and reviewers widely praise the Seiko Prospex Sea for its excellent value, robust build, and superior lume, with many noting its comfortable wearability and faithful design recreations. Some owners report the watch can feel big, thick, and heavy on smaller wrists, while others find the sizing perfect. The bezel action is frequently highlighted as smooth and precise, often exceeding that of less expensive models. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its impressive finishing and value proposition.

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