Side by side

Serica Ref. 5303 Diving ChronometervsChristopher Ward The C12 Loco

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 C12 Loco
Christopher WardThe C12 Loco
MSRP $5,460

At a glance

15 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
The C12 Loco47.5mm
Power Reserve
Ref. 5303 Diving Chronometer42h
The C12 Loco144h
Water Resistance
Ref. 5303 Diving Chronometer300m
The C12 Loco30m
MSRP
Ref. 5303 Diving Chronometer$1,768
The C12 Loco$5,460

Full specifications

Case

7 specs
Category
Diver
Diameter
39mm
47.5mm
Thickness
12.2mm
13.7mm
Lug-to-Lug
46.5mm
47.5mm
Lug Width
20mm
25mm
Finish
Brushed and polished
Brushed + Polished + Sandblasted
Water Resistance
300m
30m

Crystal & Dial

2 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
Blue

Movement

5 specs
Caliber
M100 COSC
CW-003
Beat Rate
28,800 vph
4 vph
Power Reserve
42h
144h
Jewels
25
29
Complications
COSC
Moonphase, Day-date, Date

Pricing

1 specs
MSRP
$1,768
$5,460

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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 C12 Loco

Owners widely praise the Christopher Ward The C12 Loco for its unusual technical ambition, well-finished movement aesthetics, and value, particularly noting the dial-side floating free-sprung balance. Some owners find the mid-case design creates odd proportions, and the 30m water resistance is flagged as a limitation. The watch features a manually wound twin-barrel movement in a 41mm steel case with a 47.5mm lug-to-lug and 13.7mm thickness. Overall, owners rate the Christopher Ward The C12 Loco highly for its ambitious movement design and value at its price point.

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