Side by side

Serica Ref. 5303 Diving ChronometervsChristopher Ward Twelve X Black Shadow

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
Twelve X Black Shadow
Christopher WardTwelve X Black Shadow
MSRP $6,275

At a glance

14 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Twelve X Black Shadow40mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Twelve X Black Shadow120h
Water Resistance
Ref. 5303 Diving Chronometer300m
Twelve X Black Shadow100m
MSRP
Ref. 5303 Diving Chronometer$1,768
Twelve X Black Shadow$6,275

Full specifications

Case

6 specs
Category
Diver
Skeleton
Diameter
39mm
40mm
Thickness
12.2mm
12.3mm
Lug-to-Lug
46.5mm
44.5mm
Lug Width
20mm
25mm
Water Resistance
300m
100m

Crystal & Dial

2 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
Black

Movement

5 specs
Caliber
M100 COSC
CW-001
Beat Rate
28,800 vph
4 vph
Power Reserve
42h
120h
Jewels
25
31
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$6,275

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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 Twelve X Black Shadow

Owners widely praise the Christopher Ward Twelve X Black Shadow's impressive finishing for its price point and the quality of its bracelet. Some owners, however, feel the $4,865 price is high for the brand, while others argue it offers strong specifications for the money. Reviewers note the skeletonized COSC-certified SH21 movement provides a 120-hour power reserve, but legibility suffers due to the skeletonization and the watch's increased thickness is noticeable. One owner reported sharp edges on bracelet links and unfinished clasp surfaces, leading to a return, despite finding the case and dial appealing. On balance, owners and reviewers rate the Christopher Ward Twelve X Black Shadow highly for its finishing and value, with the skeletonized movement being a key draw.

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