Side by side

Serica Ref. 5303 Diving ChronometervsWolbrook Douglas Grand Prix 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
Douglas Grand Prix Racing
WolbrookDouglas Grand Prix Racing
MSRP $442

At a glance

13 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Douglas Grand Prix Racing40mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Douglas Grand Prix Racing40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Douglas Grand Prix Racing100m
MSRP
Ref. 5303 Diving Chronometer$1,768
Douglas Grand Prix Racing$442

Full specifications

Case

6 specs
Category
Diver
Racing
Diameter
39mm
40mm
Thickness
12.2mm
13mm
Lug-to-Lug
46.5mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
100m

Crystal & Dial

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

Movement

3 specs
Caliber
M100 COSC
Miyota 8315
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$442

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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.

Wolbrook Douglas Grand Prix Racing

The Wolbrook Douglas Grand Prix Racing features a Hesalite box crystal, a roulette date wheel, and a 40mm steel case. Owners note it is powered by a Miyota 8315 movement with a 60-hour power reserve, regulated to within ±15 seconds per day. One owner points out that an earlier iteration of the movement did not hack and had a 42-hour power reserve. On balance, owners appreciate the Hesalite crystal and roulette date wheel at its $275 price point.

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