Side by side

Serica Ref. 5303 Diving ChronometervsChristopher Ward The Twelve

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
The Twelve
Christopher WardThe Twelve
MSRP $1,495

At a glance

17 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
The Twelve40mm
Power Reserve
Ref. 5303 Diving Chronometer42h
The Twelve38h
Water Resistance
Ref. 5303 Diving Chronometer300m
The Twelve100m
MSRP
Ref. 5303 Diving Chronometer$1,768
The Twelve$1,495

Full specifications

Case

8 specs
Category
Diver
Sport
Diameter
39mm
40mm
Thickness
12.2mm
9.95mm
Lug-to-Lug
46.5mm
44.5mm
Lug Width
20mm
25mm
Finish
Brushed and polished
Brushed + Polished + Sandblasted
Water Resistance
300m
100m
Caseback
Solid
Solid screw-down

Crystal & Dial

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

Movement

5 specs
Caliber
M100 COSC
SW200
Beat Rate
28,800 vph
4 vph
Power Reserve
42h
38h
Jewels
25
26
Complications
COSC
GMT, Moonphase, Day-date, Date

Pricing

1 specs
MSRP
$1,768
$1,495

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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 The Twelve

Christopher Ward The Twelve is widely praised for its excellent value, comfortable and thin titanium case, and COSC-certified movements. Owners and reviewers highlight the lightweight feel and attractive finishing. However, some find the dial design lacks originality, and one owner noted sharp edges on bracelet links and unfinished clasp interiors, leading to a return. The skeletonized dial on The Twelve X, while a selling point, can impact legibility, and the case chamfers may be prone to dings. Overall, owners and reviewers rate Christopher Ward The Twelve highly for its comfortable titanium construction and strong value proposition.

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