Side by side

Serica Ref. 5303 Diving ChronometervsBremont Williams Racing

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
Williams Racing
BremontWilliams Racing
MSRP $7,000

At a glance

14 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Williams Racing43mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Williams Racing40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Williams Racing
MSRP
Ref. 5303 Diving Chronometer$1,768
Williams Racing$7,000

Full specifications

Case

7 specs
Category
Diver
Chronograph
Diameter
39mm
43mm
Thickness
12.2mm
15.8mm
Lug-to-Lug
46.5mm
Lug Width
20mm
22mm
Material
Stainless Steel
Titanium
Water Resistance
300m

Crystal & Dial

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

Movement

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

Pricing

1 specs
MSRP
$1,768
$7,000

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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.

Bremont Williams Racing

The Bremont Williams Racing features a panda dial with blue accents and a tachymeter bezel, housed in a 43mm TripTick case. It is powered by a chronometer-rated BE-53AE automatic movement with a 42-hour power reserve and a custom rotor. While the 15.8mm height is considered reasonable for a chronograph, the 43mm case size may require trying it on for those preferring smaller watches. Overall, reviewers highlight the motorsport-inspired design and robust build of the Bremont Williams Racing.

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