Side by side

Serica Ref. 5303 Diving ChronometervsCWC E9 Quartz Diver Watch

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

Ref. 5303 Diving Chronometer
SericaRef. 5303 Diving Chronometer
MSRP $1,768
E9 Quartz Diver Watch
CWCE9 Quartz Diver Watch
MSRP $749

At a glance

10 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
E9 Quartz Diver Watch41mm
Power Reserve
Ref. 5303 Diving Chronometer42h
E9 Quartz Diver Watch40h
Water Resistance
Ref. 5303 Diving Chronometer300m
E9 Quartz Diver Watch300m
MSRP
Ref. 5303 Diving Chronometer$1,768
E9 Quartz Diver Watch$749

Full specifications

Case

3 specs
Diameter
39mm
41mm
Thickness
12.2mm
12mm
Lug-to-Lug
46.5mm
47mm

Crystal & Dial

2 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
CWC E9 Quartz Diver Watch (E9 QS120)

Movement

4 specs
Caliber
M100 COSC
Type
Automatic
Quartz
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$749

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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.

Serica Ref. 5303 Diving Chronometer

Owners widely praise the Serica Ref. 5303 Diving Chronometer for its excellent wearability, definitive style, and smooth, confident bezel action. The dual scale on the bezel is noted as surprisingly useful, and the crown action, winding, and hacking are reported to work perfectly. One owner describes the Serica 5303-3 as gorgeous and unique, though another notes the crown can appear comically large. On balance, owners rate the Serica Ref. 5303 Diving Chronometer highly for its blend of unique design and robust functionality.

CWC E9 Quartz Diver Watch

The CWC E9 Quartz Diver Watch is praised for its historical significance, unique Jolly Roger dial, and military-spec build. Owners report it is thin, small, very legible, and has a satisfyingly easy-to-wind crown, with some noting its accuracy and clean lume application. However, the luminous paint on the Jolly Roger is described as low glow, and one owner reported their T20 model had an inaccurate quartz movement and a soft acrylic crystal that scratches easily. Some find the Jolly Roger design "out there," while others like its unique aesthetic. Some feel it is overpriced for its components, particularly the standard Ronda movement. Overall, owners rate the CWC E9 Quartz Diver Watch highly for its unique aesthetic and military-inspired build.

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