Side by side

Serica Ref. 5303 Diving ChronometervsSpinnaker Bradner Pearl Diver

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
Bradner Pearl Diver
SpinnakerBradner Pearl Diver
MSRP $370

At a glance

13 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Bradner Pearl Diver42mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Bradner Pearl Diver40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Bradner Pearl Diver180m
MSRP
Ref. 5303 Diving Chronometer$1,768
Bradner Pearl Diver$370

Full specifications

Case

6 specs
Diameter
39mm
42mm
Thickness
12.2mm
15mm
Lug-to-Lug
46.5mm
50mm
Lug Width
20mm
22mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
180m

Crystal & Dial

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

Movement

3 specs
Caliber
M100 COSC
SII NH35A
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$370

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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.

Spinnaker Bradner Pearl Diver

The Spinnaker Bradner Pearl Diver is noted by owners as large on smaller wrists, with a 50mm lug-to-lug and 15mm height being a concern, though some find it acceptable with specific strap choices. Opinions on finishing quality vary, with one owner reporting issues like a poorly seated bezel and crooked indices. Overall, owners rate the Spinnaker Bradner Pearl Diver with mixed reviews regarding its size and finishing.

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