Side by side

Serica Ref. 5303 Diving ChronometervsCitizen Corso

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
Corso
CitizenCorso
MSRP $296

At a glance

14 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Corso44mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Corso40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Corso100m
MSRP
Ref. 5303 Diving Chronometer$1,768
Corso$296

Full specifications

Case

6 specs
Category
Diver
Dress
Diameter
39mm
44mm
Thickness
12.2mm
12mm
Lug-to-Lug
46.5mm
46mm
Lug Width
20mm
23mm
Water Resistance
300m
100m

Crystal & Dial

4 specs
Crystal
Sapphire
Mineral
AR Coating
Yes
Inner
Dial Color
Enamel Black
Black
Lume
Super-LumiNova
None

Movement

3 specs
Caliber
M100 COSC
8729
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$296

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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.

Citizen Corso

Citizen Corso owners widely praise its value, with many noting its accurate Eco-Drive movement keeping time within a few seconds per month. The sunburst silver dial and elegant blue dial options are frequently highlighted for their attractive, light-catching qualities suitable for various occasions. The stainless steel case is considered durable, and the metal bracelet's links are described as substantial. Some models feature day and date complications. However, reviewers note the polished steel case can be overly shiny and a fingerprint magnet, and the original leather bands have an unpleasant lining. One owner questions the 40mm dial size for smaller wrists, and the bracelet has a stamped clasp without micro-adjustments, though it includes two half links. Overall, owners rate the Citizen Corso highly for its impressive value and classic dial aesthetics at its price point.

From video reviewers

The Citizen Corso features a convenient Eco-Drive movement that eliminates battery changes by utilizing light for power. A weakness of the Citizen Corso is its mineral crystal, which is less scratch-resistant than sapphire.

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