CWC RN300 Automatic Diver Mk.1 Tritium With DatevsLorier Neptune SIV
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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.

RN300 Automatic Diver Mk.1 Tritium With Date

Neptune SIV
Diameter
40mm
39mm
Thickness
14.5mm
n/a
Water Resistance
300m
highest
200m
MSRP
$3,174
$599
lowest
Movement
ETA 2824-2
Automatic
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.
Owners widely praise the CWC (Cabot Watch Company) RN300 Automatic Diver Mk.1 Tritium Watch With Date for its robust build, military heritage, and iconic design elements like the big triangle and sword hands, with many finding its case finishing excellent and its bezel action satisfyingly chunky and precise. The watch is noted for its good lume and legibility, and some owners appreciate its polished steel finish and vintage vibe. Accuracy figures vary, with one owner reporting +1 second per day and another seeing 3 seconds fast over 24 hours. A point of contention for some is the fixed lug bars, which limit strap options, and a few reviewers feel the price has increased significantly, making it harder to justify compared to other brands. Overall, owners and reviewers rate the CWC (Cabot Watch Company) RN300 Automatic Diver Mk.1 Tritium Watch With Date highly for its sturdy, utilitarian design and military significance.
Owners widely praise the Lorier Neptune SIV for its balanced, vintage-inspired design and affordability, making it a versatile choice for daily wear. The fully brushed flat-link bracelet is noted for its comfort and taper, though some find its feel less luxurious than higher-end options. A minority of owners express a preference for sapphire over the acrylic crystal and find its case proportions less refined than a competitor. Overall, owners rate the Lorier Neptune SIV highly for its vintage aesthetic and value proposition.
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