Side by side

CWC G40 Sonar Quartz WatchvsSeiko 5 Sports Field series

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
5 Sports Field series
Seiko5 Sports Field series
MSRP $315

At a glance

14 of 29 specs differ
Diameter
G40 Sonar Quartz Watch40mm
5 Sports Field series39.4mm
Power Reserve
G40 Sonar Quartz Watch40h
5 Sports Field series41h
Water Resistance
G40 Sonar Quartz Watch200m
5 Sports Field series100m
MSRP
G40 Sonar Quartz Watch$333
5 Sports Field series$315

Full specifications

Case

5 specs
Category
Field
Sport
Diameter
40mm
39.4mm
Thickness
12mm
13.2mm
Lug-to-Lug
46mm
48.1mm
Water Resistance
200m
100m

Crystal & Dial

5 specs
Crystal
Sapphire
Hardlex
Crystal Shape
Flat
Curved
AR Coating
Yes
Inner
Dial Color
CWC G40 Sonar Quartz Watch
Black
Lume
Super-LumiNova
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
4R36
Power Reserve
40h
41h
Jewels
25
24

Pricing

1 specs
MSRP
$333
$315

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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.

Seiko 5 Sports Field series

The Seiko 5 Sports Field series is praised for its value, offering an accessible explorer-style watch with a GMT complication and excellent legibility thanks to LumiBrite on the dial and bezel. The watches feature a 41mm stainless steel case, 100m water resistance, and are powered by either the 4R36 or 4R34 movement, both with a 41-hour power reserve. One reviewer notes the inclusion of a compass bezel with a lumed pearl and fully lumed Arabic numerals on the dial for the non-GMT models. Overall, reviewers consider the Seiko 5 Sports Field GMT models good value under 500 euros.

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