Side by side

Serica Ref. 5303 Diving ChronometervsOrient Sport Watch

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
Sport Watch
OrientSport Watch
MSRP $245

At a glance

17 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Sport Watch41.9mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Sport Watch40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Sport Watch50m
MSRP
Ref. 5303 Diving Chronometer$1,768
Sport Watch$245

Full specifications

Case

7 specs
Category
Diver
Diameter
39mm
41.9mm
Thickness
12.2mm
12mm
Lug-to-Lug
46.5mm
48mm
Lug Width
20mm
22mm
Water Resistance
300m
50m
Caseback
Solid
Display

Crystal & Dial

4 specs
Crystal
Sapphire
Mineral
AR Coating
Yes
Inner
Dial Color
Enamel Black
Black
Lume
Super-LumiNova
None

Movement

5 specs
Caliber
M100 COSC
F6922
Beat Rate
28,800 vph
21,600 vph
Power Reserve
42h
40h
Jewels
25
22
Complications
COSC
Day-date

Pricing

1 specs
MSRP
$1,768
$245

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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.

Orient Sport Watch

Owners praise the Orient Sport Watch for its sapphire crystal, day and date complications, and overall value around $300, with one owner calling the red dial version the best-looking dive watch in its price range. A modern 40mm case size is noted, alongside Orient's signature power reserve indicator. One reviewer flags the use of a mineral crystal and a non-hacking, non-hand-winding automatic movement as drawbacks for the price. On balance, owners rate the Orient Sport Watch highly for its impressive value and feature set at the price point.

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