Which is cheaper, the Serica Ref. 5303 Diving Chronometer or the Signum Cero?

At MSRP the Signum Cero is the cheaper of the two at $519, against $1,768 for the Serica Ref. 5303 Diving Chronometer — a $1,249 gap before any retailer discounting.

Which is bigger, the Serica Ref. 5303 Diving Chronometer or the Signum Cero?

The Signum Cero wears larger at 39.5mm versus 39mm for the Serica Ref. 5303 Diving Chronometer — a 0.5mm difference across the dial.

Which has better water resistance, the Serica Ref. 5303 Diving Chronometer or the Signum Cero?

The Serica Ref. 5303 Diving Chronometer is rated to 300m versus 200m for the Signum Cero.

What movement does the Serica Ref. 5303 Diving Chronometer run compared to the Signum Cero?

Both watches run automatic movements — the Serica Ref. 5303 Diving Chronometer uses the M100 COSC and the Signum Cero uses the Seiko NH35.

Side by side

Serica Ref. 5303 Diving ChronometervsSignum Cero

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

Add a watch

Serica Ref. 5303 Diving Chronometer

5303-1-diving-chronometer

MSRP $1,768

Signum Cero

signum-cero-bronze-labradorite-blue-or-purple

MSRP $519

At a glance

14 of 29 specs differ

Diameter

Ref. 5303 Diving Chronometer39mm

Cero39.5mm

Power Reserve

Ref. 5303 Diving Chronometer42h

Cero—

Water Resistance

Ref. 5303 Diving Chronometer300m

Cero200m

MSRP

Ref. 5303 Diving Chronometer$1,768

Cero$519

Full specifications

Case

7 specs

Crystal & Dial

3 specs

AR Coating

Yes

Inner

Dial Color

Enamel Black

—

Lume

Super-LumiNova

None

Movement

3 specs

Caliber

M100 COSC

Seiko NH35

Power Reserve

42h

—

Complications

COSC

None

Pricing

1 specs

MSRP

$1,768

$519

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Serica Ref. 5303 Diving ChronometervsSignum Cero

At a glance

Full specifications

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