Side by side

Serica Ref. 5303 Diving ChronometervsChristopher Ward Twelve X (Ti) Titanium

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 (Ti) Titanium
Christopher WardTwelve X (Ti) Titanium
MSRP $5,375

At a glance

17 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Twelve X (Ti) Titanium46.3mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Twelve X (Ti) Titanium120h
Water Resistance
Ref. 5303 Diving Chronometer300m
Twelve X (Ti) Titanium100m
MSRP
Ref. 5303 Diving Chronometer$1,768
Twelve X (Ti) Titanium$5,375

Full specifications

Case

8 specs
Category
Diver
Skeleton
Diameter
39mm
46.3mm
Thickness
12.2mm
12.3mm
Lug-to-Lug
46.5mm
46.3mm
Lug Width
20mm
25mm
Material
Stainless Steel
Titanium
Finish
Brushed and polished
Brushed + Polished + Satin + Sandblasted
Water Resistance
300m
100m

Crystal & Dial

3 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
Black
Lume
Super-LumiNova
None

Movement

5 specs
Caliber
M100 COSC
SH21
Beat Rate
28,800 vph
4 vph
Power Reserve
42h
120h
Jewels
25
31
Complications
COSC
Moonphase

Pricing

1 specs
MSRP
$1,768
$5,375

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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 (Ti) Titanium

Owners and reviewers widely praise the Christopher Ward Twelve X (Ti) Titanium for its exceptional value, lightweight titanium construction, and comfortable wearability, with case thickness noted as under 9mm by some and around 12.3mm by others. The watch features a COSC-certified movement, either a Sellita SW300-1 or a skeletonized SH21 with a 5-day or 120-hour power reserve, and reviewers highlight excellent lume performance and improved legibility on skeletonized dials. Some find the bracelet's one-step micro-adjustment clasp convenient, while others report sharp bracelet links and unfinished clasp interiors, and one owner noted the "Arctic White" dial appeared silver. There is a split on Christopher Ward design originality and the potential for case and bracelet chamfers to be prone to dings.

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