Side by side

CWC G40 Sonar Quartz WatchvsFormex Reef 39.5 mm

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
Reef 39.5 mm
FormexReef 39.5 mm
MSRP $2,230
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.

Formex Reef 39.5 mm

The Formex Reef 39.5 mm is widely praised for its refined finishing, comfortable and well-proportioned case design, and impressive specifications for its price point, including COSC-certified Sellita SW300-1 movement and 300m water resistance. Owners and reviewers highlight the tool-less micro-adjust clasp and quick-release spring bars as practical features. Some reviewers note that the 22mm lug width feels slightly disproportionate to the smaller case, and the bracelet could benefit from more taper, though this is a point of contention for some owners who value the overall package. A prototype crown protrusion issue is noted as being addressed for production. On balance, owners and reviewers rate the Formex Reef 39.5 mm highly for its excellent value and well-executed design.

At a glance

11 of 29 specs differ
Diameter
G40 Sonar Quartz Watch40mm
Reef 39.5 mm39.5mm
Power Reserve
G40 Sonar Quartz Watch40h
Reef 39.5 mm56h
Water Resistance
G40 Sonar Quartz Watch200m
Reef 39.5 mm300m
MSRP
G40 Sonar Quartz Watch$333
Reef 39.5 mm$2,230

Full specifications

Case

6 specs
Category
Field
Diver
Diameter
40mm
39.5mm
Thickness
12mm
11mm
Lug-to-Lug
46mm
45.5mm
Lug Width
20mm
22mm
Water Resistance
200m
300m

Crystal & Dial

2 specs
AR Coating
Yes
Inner
Dial Color
CWC G40 Sonar Quartz Watch
Bahama Blue

Movement

2 specs
Caliber
Sellita SW300-1
Power Reserve
40h
56h

Pricing

1 specs
MSRP
$333
$2,230

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