Side by side

CWC G40 Sonar Quartz WatchvsCWC RN Quartz Divers Watch Mk.2, Matte Top

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

G40 Sonar Quartz Watch
CWCG40 Sonar Quartz Watch
MSRP $333
RN Quartz Divers Watch Mk.2, Matte Top
CWCRN Quartz Divers Watch Mk.2, Matte Top
MSRP $604

At a glance

8 of 29 specs differ
Diameter
G40 Sonar Quartz Watch40mm
RN Quartz Divers Watch Mk.2, Matte Top41mm
Power Reserve
G40 Sonar Quartz Watch40h
RN Quartz Divers Watch Mk.2, Matte Top40h
Water Resistance
G40 Sonar Quartz Watch200m
RN Quartz Divers Watch Mk.2, Matte Top300m
MSRP
G40 Sonar Quartz Watch$333
RN Quartz Divers Watch Mk.2, Matte Top$604

Full specifications

Case

4 specs
Category
Field
Diver
Diameter
40mm
41mm
Lug-to-Lug
46mm
47mm
Water Resistance
200m
300m

Crystal & Dial

1 specs
Dial Color
CWC G40 Sonar Quartz Watch
CWC RN Quartz Divers Watch Mk.2, Matte Top (RN300-MT QS120)

Movement

2 specs
Caliber
Ronda 517
Type
Automatic
Quartz

Pricing

1 specs
MSRP
$333
$604

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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 G40 Sonar Quartz Watch

Owners widely appreciate the CWC G40 Sonar Quartz Watch for its classic G10 design, 40mm case size, and 20atm water resistance, noting its light, rugged, and reliable "grab-n-go" nature. Some find the dial proportions have too much negative space, while others praise its unique anodized red crown and quality NATO straps. A larger crown can dig into the wrist, and the lack of a battery hatch is a trade-off for its 100m water resistance. On balance, owners value the CWC G40 Sonar Quartz Watch for its robust build and classic aesthetic, though its price point and competition are frequently cited concerns.

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.

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