Side by side

Serica Ref. 5303 Diving ChronometervsChristopher Ward C60 Atoll 300

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
C60 Atoll 300
Christopher WardC60 Atoll 300
MSRP $1,320

At a glance

14 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
C60 Atoll 30047.4mm
Power Reserve
Ref. 5303 Diving Chronometer42h
C60 Atoll 30038h
Water Resistance
Ref. 5303 Diving Chronometer300m
C60 Atoll 300300m
MSRP
Ref. 5303 Diving Chronometer$1,768
C60 Atoll 300$1,320

Full specifications

Case

5 specs
Diameter
39mm
47.4mm
Thickness
12.2mm
11.3mm
Lug-to-Lug
46.5mm
47.4mm
Finish
Brushed and polished
Brushed + Polished + Sandblasted
Caseback
Solid
Display

Crystal & Dial

3 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
Blue
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
Moonphase, Day-date, Date

Pricing

1 specs
MSRP
$1,768
$1,320

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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 C60 Atoll 300

Owners widely praise the Christopher Ward C60 Atoll 300 for its superb fit and finish, with its "light catcher" case described as jewelry-like and its dial as beautiful and well-coordinated with the strap. The Sellita SW200-1 movement is noted for running near COSC standards, though one owner reports accuracy around -6 seconds per day while another notes +1/+2 seconds per day. Some users desire a larger 42mm size option. On balance, owners rate the Christopher Ward C60 Atoll 300 highly for its exceptional case finishing and dial aesthetics at its price point.

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