Side by side

Serica Ref. 5303 Diving ChronometervsCincinnati Watch Company P-40 A-11 Pilot Black Automatic

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
P-40 A-11 Pilot Black Automatic
Cincinnati Watch CompanyP-40 A-11 Pilot Black Automatic
MSRP $895

At a glance

17 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
P-40 A-11 Pilot Black Automatic38mm
Power Reserve
Ref. 5303 Diving Chronometer42h
P-40 A-11 Pilot Black Automatic65h
Water Resistance
Ref. 5303 Diving Chronometer300m
P-40 A-11 Pilot Black Automatic100m
MSRP
Ref. 5303 Diving Chronometer$1,768
P-40 A-11 Pilot Black Automatic$895

Full specifications

Case

7 specs
Category
Diver
Pilot
Diameter
39mm
38mm
Thickness
12.2mm
10.8mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed and polished
Water Resistance
300m
100m
Caseback
Solid
Screw Down w/ Sapphire Display

Crystal & Dial

5 specs
Crystal Shape
Flat
Domed
AR Coating
Yes
Underside
Dial Color
Enamel Black
Black
Indices
Applied
Lume
Super-LumiNova
X1 C3

Movement

4 specs
Caliber
M100 COSC
Sellita SW200-2
Power Reserve
42h
65h
Jewels
25
26
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$895

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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.

Cincinnati Watch Company P-40 A-11 Pilot Black Automatic

Owners widely praise the Cincinnati Watch Company P-40 A-11 Pilot Black Automatic for its sharp finishing, textured pearlescent dial, and excellent lume. The simple, understated design and comfortable 38mm size are also frequently highlighted. Some owners note the bracelet lacks quick micro-adjustments and the quick-release spring bars can dig into the wrist. One owner found the lume blocks potentially thinner and the font on larger numbers less desirable than a standard typeface, though the seconds hand was considered a success. Overall, owners highly recommend the Cincinnati Watch Company P-40 A-11 Pilot Black Automatic for its great craftsmanship and value.

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