Side by side

Serica Ref. 5303 Diving ChronometervsChristopher Ward C63 Valour

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
C63 Valour
Christopher WardC63 Valour
MSRP $1,050

At a glance

17 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
C63 Valour45.8mm
Power Reserve
Ref. 5303 Diving Chronometer42h
C63 Valour40h
Water Resistance
Ref. 5303 Diving Chronometer300m
C63 Valour150m
MSRP
Ref. 5303 Diving Chronometer$1,768
C63 Valour$1,050

Full specifications

Case

7 specs
Category
Diver
Chronograph
Diameter
39mm
45.8mm
Thickness
12.2mm
11.55mm
Lug-to-Lug
46.5mm
45.8mm
Finish
Brushed and polished
Brushed + Polished
Water Resistance
300m
150m
Caseback
Solid
Engraved

Crystal & Dial

3 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
Black
Lume
Super-LumiNova
SLN X1 BL C1

Movement

6 specs
Caliber
M100 COSC
G10
Type
Automatic
Quartz
Beat Rate
28,800 vph
768 vph
Power Reserve
42h
40h
Jewels
25
4
Complications
COSC
Chronograph, Moonphase

Pricing

1 specs
MSRP
$1,768
$1,050

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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.

Christopher Ward C63 Valour

Owners widely praise the Christopher Ward C63 Valour for its beautiful, deep dial with 3D applied markers and symmetric chronograph design, with some calling it one of the best-looking and most affordable chronographs available. Reviewers note the 39mm wide, 11.55mm thick Light-catcher case with flowing curves and contrasting finishes. The watch is powered by a thermocompensated, chronometer-certified quartz ETA G10.212 AD movement, with ETA claiming ±10 seconds per year accuracy via PreciDrive technology. However, some owners question the use of a quartz movement in a watch of this caliber, though others defend it for reliability and thinner profiles, while also debating if its claimed accuracy meets High Accuracy Quartz (HAQ) standards. Overall, owners and reviewers appreciate the Christopher Ward C63 Valour for its striking aesthetics and value, with the primary point of contention being its quartz movement.

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