CWC (Cabot Watch Company) RN81 Diver Automatic WatchvsUnimatic Modello Quattro U4S-WMB

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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.

RN81 Diver Automatic Watch

Modello Quattro U4S-WMB
Diameter
41mm
40mm
Lug-to-Lug
47mm
n/a
Thickness
12.7mm
n/a
Water Resistance
300m
300m
Power Reserve
n/a
41h
MSRP
$2,858
$1,660
lowest
Movement
Sellita SW200-1
Sellita SW200-1
Case
4 specsMovement
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the CWC (Cabot Watch Company) RN81 Diver Automatic Watch for its robust build and preferred dial layout, featuring an iconic big triangle and sword hands reminiscent of the 1980 original. The bezel action is described as nice and chunky, and the case wears beautifully. Some reviewers note the polished case sides and "faux patina" lume color as unusual or slightly glossy for a military-issued watch, and fixed springbars are flagged as a potential drawback. Accuracy varies, with one owner reporting it running 3 seconds fast per 24 hours. On balance, owners and reviewers appreciate the CWC (Cabot Watch Company) RN81 Diver Automatic Watch for its faithful homage design and solid construction, despite some reservations about its finishing and price point.
The Unimatic Modello Quattro U4S-WMB is praised for its familiar yet fresh minimalist design with a sturdy 40mm case and brushed finish that fits its military character. Reviewers note it is slightly thicker than the Modello Uno due to a thicker sapphire crystal and a fixed bezel. One source mentions an average accuracy of +/-12 seconds per day for a variant with the Sellita SW200-1 b movement. On balance, reviewers find the Unimatic Modello Quattro U4S-WMB appealing for its design and build, though some desire a smaller case size and note a lack of distinction compared to other models.
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