Marathon OSAR-D (Original SAR with Date) Automatic 41mmvsMomentum Sea Auto 30
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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
Sea Auto 30
Diameter
41mm
42mm
Lug-to-Lug
43.5mm
lowest
47mm
Thickness
13mm
12.6mm
lowest
Water Resistance
300m
300m
Power Reserve
n/a
42h
MSRP
$1,800
$585
lowest
Movement
Sellita SW220-1
Miyota 9015
Case
5 specsCrystal & Dial
1 specsMovement
2 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.
Owners widely praise the Momentum Sea Auto 30 for its value, readability, and overall fit and finish, with many appreciating its comfortable wearability and durable tool watch design. One owner notes the soft tropic strap and that the 42mm case wears smaller than expected. Some owners report that the second hand on quartz variants does not always align with the indices, and one owner found the bezel action stiff with some backplay. Overall, owners rate the Momentum Sea Auto 30 highly for its value and tool watch capabilities.
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