CWC RN Quartz Divers Watch Mk.2, Matte TopvsSinn U50 Hydro Sdr with Tegiment option
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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.

RN Quartz Divers Watch Mk.2, Matte Top

U50 Hydro Sdr with Tegiment option
Diameter
41mm
41mm
Lug-to-Lug
47mm
n/a
Thickness
n/a
11.8mm
Water Resistance
300m
5000m
highest
MSRP
$604
lowest
$3,110
Movement
Ronda 517
Ronda 715Li
Case
5 specsCrystal & Dial
5 specsMovement
4 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the CWC RN Quartz Divers Watch Mk.2, Matte Top for its matte finish, precise seconds hand alignment, and old-school dial and hands reminiscent of vintage Omega. The Mk.2 upgrades, including a sapphire crystal, improved lume, and a precise 120-click bezel described as "perfection," are consistently highlighted. Some owners consider its toolish design and comfortable 11mm thickness a significant draw. However, a few find the £700-£900 price point high for a quartz watch, and one owner reported chipping on the PVD finish after a few months. One owner also noted the Ronda 517 quartz movement gained 8 seconds over several months. Overall, owners rate the CWC RN Quartz Divers Watch Mk.2, Matte Top highly for its robust, military-inspired design and significant Mk.2 upgrades at the price.
Owners widely report the Sinn U50 HYDRO SDR with TEGIMENT option offers exceptional scratch resistance from its fully Tegimented case, bezel, and bracelet, with one owner noting no signs of wear after nine months. Reviewers highlight the oil-filled case's contribution to extreme water resistance and excellent legibility, while some owners find the case design simple yet great. The watch utilizes a quartz movement, and a reviewer notes its lume is considered underwhelming compared to other watches, with one owner finding the diving extension on the clasp can release too easily. On balance, owners and reviewers rate the Sinn U50 HYDRO SDR with TEGIMENT option highly for its robust, scratch-resistant build and excellent legibility.
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