Side by side

CWC G40 Sonar Quartz WatchvsRedux Zero-Hour

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
Zero-Hour
ReduxZero-Hour

At a glance

11 of 29 specs differ
Diameter
G40 Sonar Quartz Watch40mm
Zero-Hour39mm
Power Reserve
G40 Sonar Quartz Watch40h
Zero-Hour41h
Water Resistance
G40 Sonar Quartz Watch200m
Zero-Hour200m
MSRP
G40 Sonar Quartz Watch$333
Zero-Hour

Full specifications

Case

5 specs
Category
Field
Diameter
40mm
39mm
Thickness
12mm
13.7mm
Lug-to-Lug
46mm
46.6mm
Material
Stainless Steel
Titanium

Crystal & Dial

3 specs
AR Coating
Yes
Inner
Dial Color
CWC G40 Sonar Quartz Watch
Black
Lume
Super-LumiNova
None

Movement

2 specs
Caliber
Seiko NH35
Power Reserve
40h
41h

Pricing

1 specs
MSRP
$333

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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.

Redux Zero-Hour

Owners widely praise the Redux Courg Zero Hour 39MM for its robust, utilitarian design inspired by pilot and dive tools, its lightweight Grade 5 titanium construction, and its comfortable wearability. The proprietary RDXB1 lume is noted for its bright initial glow, though it fades quickly. The Seiko NH53A or NH35 movement is generally considered reliable. However, multiple owners report a flimsy or fragile crown stem, and some describe the unidirectional bezel as having play or being able to rotate clockwise by one minute, though one owner reported a tight bezel with no play. The 39mm case size is considered good by some, while others find it small for larger wrists or note it looks large, with some desiring a 42mm option. One owner found the titanium finish looked slightly cheap and wished for a bezel insert. The dial is described by one owner as too busy for easy reading without glasses. The Redux Courg Zero Hour 39MM is available for $300, down from an original price of $507.

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