Side by side

CWC RN Quartz Divers Watch Mk.2, Matte TopvsSeiko Prospex Sea

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

RN Quartz Divers Watch Mk.2, Matte Top
CWCRN Quartz Divers Watch Mk.2, Matte Top
MSRP $604
Prospex Sea
SeikoProspex Sea
MSRP $795

At a glance

10 of 29 specs differ
Diameter
RN Quartz Divers Watch Mk.2, Matte Top41mm
Prospex Sea34mm
Power Reserve
RN Quartz Divers Watch Mk.2, Matte Top40h
Prospex Sea40h
Water Resistance
RN Quartz Divers Watch Mk.2, Matte Top300m
Prospex Sea200m
MSRP
RN Quartz Divers Watch Mk.2, Matte Top$604
Prospex Sea$795

Full specifications

Case

5 specs
Diameter
41mm
34mm
Thickness
12mm
8.7mm
Lug-to-Lug
47mm
40.8mm
Lug Width
20mm
16mm
Water Resistance
300m
200m

Crystal & Dial

3 specs
AR Coating
Yes
Anti-reflective coating on inner surface
Dial Color
CWC RN Quartz Divers Watch Mk.2, Matte Top (RN300-MT QS120)
Black
Lume
Super-LumiNova
LumiBrite on hands and index(es)

Movement

1 specs
Caliber
Ronda 517
6N01

Pricing

1 specs
MSRP
$604
$795

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

CWC RN Quartz Divers Watch Mk.2, Matte Top

Owners widely praise the CWC RN Quartz Divers Watch Mk.2, Matte Top for its excellent matte case finishing, precise seconds hand alignment, and dial reminiscent of vintage military watches. The Mk.2 upgrades, including a sapphire crystal, improved lume, and a precise 120-click bezel described as perfection with no play, are consistently highlighted as significant improvements over earlier versions. One owner noted the quartz movement gained 8 seconds over several months. Overall, owners rate the CWC RN Quartz Divers Watch Mk.2, Matte Top highly for its solid construction, military significance, and terrific value.

Seiko Prospex Sea

Owners widely praise the Seiko Prospex Sea for its excellent value, robust build, and superb lume, with many appreciating its comfortable wearability due to its case shape and lug-to-lug distance. Reviewers consistently highlight its impressive finishing and classic dive watch design, often noting the bright LumiBrite lume. Some owners find the watch to be large, thick, and heavy, while others consider it the perfect size, indicating a split opinion on wearability for smaller wrists. The power reserve from some movements is noted as less than newer variants, and the clasp quality receives mixed feedback. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its exceptional finishing and value proposition in the dive watch market.

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