Which is cheaper, the Serica Ref. 5303 Diving Chronometer or the Orient AC0Q-40 Diver Watch?

At MSRP the Orient AC0Q-40 Diver Watch is the cheaper of the two at $370, against $1,768 for the Serica Ref. 5303 Diving Chronometer — a $1,398 gap before any retailer discounting.

Which is bigger, the Serica Ref. 5303 Diving Chronometer or the Orient AC0Q-40 Diver Watch?

The Orient AC0Q-40 Diver Watch wears larger at 39.9mm versus 39mm for the Serica Ref. 5303 Diving Chronometer — a 0.9mm difference across the dial.

Which has better water resistance, the Serica Ref. 5303 Diving Chronometer or the Orient AC0Q-40 Diver Watch?

The Serica Ref. 5303 Diving Chronometer is rated to 300m versus 200m for the Orient AC0Q-40 Diver Watch.

Which has a longer power reserve, the Serica Ref. 5303 Diving Chronometer or the Orient AC0Q-40 Diver Watch?

The Serica Ref. 5303 Diving Chronometer carries a 42-hour power reserve against 40 hours on the Orient AC0Q-40 Diver Watch.

What movement does the Serica Ref. 5303 Diving Chronometer run compared to the Orient AC0Q-40 Diver Watch?

Both watches run automatic movements — the Serica Ref. 5303 Diving Chronometer uses the M100 COSC and the Orient AC0Q-40 Diver Watch uses the F6722.

Side by side

Serica Ref. 5303 Diving ChronometervsOrient AC0Q-40 Diver Watch

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Serica Ref. 5303 Diving Chronometer

5303-1-diving-chronometer

MSRP $1,768

Orient AC0Q-40 Diver Watch

ra-ac0q01b30b

MSRP $370

At a glance

12 of 29 specs differ

Diameter

Ref. 5303 Diving Chronometer39mm

AC0Q-40 Diver Watch39.9mm

Power Reserve

Ref. 5303 Diving Chronometer42h

AC0Q-40 Diver Watch40h

Water Resistance

Ref. 5303 Diving Chronometer300m

AC0Q-40 Diver Watch200m

MSRP

Ref. 5303 Diving Chronometer$1,768

AC0Q-40 Diver Watch$370

Full specifications

Case

3 specs

Diameter

39mm

39.9mm

Thickness

12.2mm

12.8mm

Water Resistance

300m

200m

Crystal & Dial

3 specs

AR Coating

Yes

Inner

Dial Color

Enamel Black

Black

Lume

Super-LumiNova

None

Movement

5 specs

Caliber

M100 COSC

F6722

Beat Rate

28,800 vph

21,600 vph

Power Reserve

42h

40h

Jewels

Complications

COSC

Date

Pricing

1 specs

MSRP

$1,768

$370

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