Marathon OSAR-D (Original SAR with Date) Automatic 41mmvsAlsta Nautoscaph
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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

Nautoscaph
Diameter
41mm
40mm
Lug-to-Lug
43.5mm
lowest
51.3mm
Thickness
13mm
lowest
16.2mm
Water Resistance
300m
300m
Power Reserve
n/a
41h
MSRP
$1,800
$595
lowest
Movement
Sellita SW220-1
Seiko NH35
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 report the Alsta NAUTOSCAPH wears comfortably on the wrist, though some find it dense and top-heavy. Reviewers praise its dial design and colorway, with one enthusiastically recommending it for Jaws fans and noting the attractive contrasting polished and brushed finishes. A minor drawback mentioned is the lack of lume at the 3 o'clock position. Community members and reviewers alike consider the €900 price point for the Seiko NH35 movement excessive. Overall, owners and reviewers rate the Alsta NAUTOSCAPH highly for its Jaws-inspired aesthetic and attractive dial, despite concerns about its thickness and value proposition.
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