Marathon OSAR-D (Original SAR with Date) Automatic 41mmvsCWC RN Automatic Divers Watch Mk.2
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

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

RN Automatic Divers Watch Mk.2
Diameter
41mm
41mm
Lug-to-Lug
43.5mm
lowest
47mm
Thickness
13mm
n/a
Water Resistance
300m
300m
MSRP
$1,800
$1,249
lowest
Movement
Sellita SW220-1
Sellita SW200-1
Case
4 specsCrystal & Dial
2 specsMovement
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Marathon OSAR-D (Original SAR with Date) Automatic 41mm is noted for its high legibility, featuring large hour markers and a white dial with applied indices. A functional date magnifier is present. The watch utilizes a reliable Sellita SW200-1 automatic movement. One reviewer found the bracelet lacked refinement and preferred the rubber strap option. On balance, reviewers highlight the Marathon OSAR-D (Original SAR with Date) Automatic 41mm's strong legibility and functional design as its primary strengths.
The CWC RN Automatic Divers Watch Mk.2 is praised for its build quality, utilitarian capabilities, and classic design, with owners appreciating its historical connection to the UK Navy and its suitability as a tool watch. Some find the fixed spring bars a drawback, limiting strap choices. One owner noted average finishing and a chipped polish. The CWC RN Automatic Divers Watch Mk.2 is a 41mm automatic diver with 300m water resistance. On balance, owners view the CWC RN Automatic Divers Watch Mk.2 positively for its heritage and robust tool-watch nature, despite some reservations about its price and finishing.
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