Side by side

Serica Ref. 5303 Diving ChronometervsBremont S502

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
S502
BremontS502
MSRP $5,100

At a glance

13 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
S50243mm
Power Reserve
Ref. 5303 Diving Chronometer42h
S50240h
Water Resistance
Ref. 5303 Diving Chronometer300m
S502500m
MSRP
Ref. 5303 Diving Chronometer$1,768
S502$5,100

Full specifications

Case

6 specs
Diameter
39mm
43mm
Thickness
12.2mm
16.5mm
Lug-to-Lug
46.5mm
Lug Width
20mm
16.5mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
500m

Crystal & Dial

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

Movement

3 specs
Caliber
M100 COSC
BE-93-2AE
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$5,100

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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 S502

The Bremont S502 is widely praised for its attractive full-stealth, black DLC treatment, and the beige lume that complements its Spec Ops design, with a burnt-orange GMT hand enhancing legibility. Owners find the watch handsome and cool, appreciating the 'black & tan' aesthetic suitable for hard wear. The Bremont S502 features a 502m water-resistance rating and a 42-hour power reserve, powered by a chronometer-rated Bremont BE-93-2AV automatic movement. While many like the NATO strap for its aesthetic and how it ties in with the PVD metalwork, some prefer the original black rubber strap for its comfort and custom fit. On balance, owners and reviewers rate the Bremont S502 highly for its stealthy aesthetic and robust build.

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