Which is cheaper, the Serica Ref. 5303 Diving Chronometer or the Praesidus 42mm Automatic?

At MSRP the Praesidus 42mm Automatic is the cheaper of the two at $269, against $1,768 for the Serica Ref. 5303 Diving Chronometer — a $1,499 gap before any retailer discounting.

Which is bigger, the Serica Ref. 5303 Diving Chronometer or the Praesidus 42mm Automatic?

The Serica Ref. 5303 Diving Chronometer wears larger at 39mm versus 38mm for the Praesidus 42mm Automatic — a 1mm difference across the dial.

Which has better water resistance, the Serica Ref. 5303 Diving Chronometer or the Praesidus 42mm Automatic?

The Serica Ref. 5303 Diving Chronometer is rated to 300m versus 100m for the Praesidus 42mm Automatic.

Which has a longer power reserve, the Serica Ref. 5303 Diving Chronometer or the Praesidus 42mm Automatic?

The Serica Ref. 5303 Diving Chronometer carries a 42-hour power reserve against 40 hours on the Praesidus 42mm Automatic.

What movement does the Serica Ref. 5303 Diving Chronometer run compared to the Praesidus 42mm Automatic?

Both watches run automatic movements — the Serica Ref. 5303 Diving Chronometer uses the M100 COSC and the Praesidus 42mm Automatic uses the Seiko NH35.

Side by side

Serica Ref. 5303 Diving ChronometervsPraesidus 42mm Automatic

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

Praesidus 42mm Automatic

P-42-TR-MIC-DBRAG

MSRP $269

At a glance

14 of 29 specs differ

Diameter

Ref. 5303 Diving Chronometer39mm

42mm Automatic38mm

Power Reserve

Ref. 5303 Diving Chronometer42h

42mm Automatic40h

Water Resistance

Ref. 5303 Diving Chronometer300m

42mm Automatic100m

MSRP

Ref. 5303 Diving Chronometer$1,768

42mm Automatic$269

Full specifications

Case

7 specs

Crystal & Dial

3 specs

AR Coating

Yes

Inner

Dial Color

Enamel Black

42mm Automatic

Lume

Super-LumiNova

None

Movement

3 specs

Caliber

M100 COSC

Seiko NH35

Power Reserve

42h

40h

Complications

COSC

None

Pricing

1 specs

MSRP

$1,768

$269

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