Which is cheaper, the Serica Ref. 5303 Diving Chronometer or the Lum-Tec RPM?

At MSRP the Lum-Tec RPM is the cheaper of the two at $495, against $1,768 for the Serica Ref. 5303 Diving Chronometer — a $1,273 gap before any retailer discounting.

Which is bigger, the Serica Ref. 5303 Diving Chronometer or the Lum-Tec RPM?

The Lum-Tec RPM wears larger at 43mm versus 39mm for the Serica Ref. 5303 Diving Chronometer — a 4mm difference across the dial.

Which has better water resistance, the Serica Ref. 5303 Diving Chronometer or the Lum-Tec RPM?

The Serica Ref. 5303 Diving Chronometer is rated to 300m versus 50m for the Lum-Tec RPM.

Which has a longer power reserve, the Serica Ref. 5303 Diving Chronometer or the Lum-Tec RPM?

The Serica Ref. 5303 Diving Chronometer carries a 42-hour power reserve against 40 hours on the Lum-Tec RPM.

What movement does the Serica Ref. 5303 Diving Chronometer run compared to the Lum-Tec RPM?

The Serica Ref. 5303 Diving Chronometer runs a automatic caliber (M100 COSC), while the Lum-Tec RPM runs a quartz.

Side by side

Serica Ref. 5303 Diving ChronometervsLum-Tec RPM

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

Lum-Tec RPM

rpm-3

MSRP $495

At a glance

14 of 29 specs differ

Diameter

Ref. 5303 Diving Chronometer39mm

RPM43mm

Power Reserve

Ref. 5303 Diving Chronometer42h

RPM40h

Water Resistance

Ref. 5303 Diving Chronometer300m

RPM50m

MSRP

Ref. 5303 Diving Chronometer$1,768

RPM$495

Full specifications

Case

6 specs

Crystal & Dial

3 specs

AR Coating

Yes

Inner

Dial Color

Enamel Black

RPM 3

Lume

Super-LumiNova

None

Movement

4 specs

Caliber

M100 COSC

—

Type

Automatic

Quartz

Power Reserve

42h

40h

Complications

COSC

None

Pricing

1 specs

MSRP

$1,768

$495

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Serica Ref. 5303 Diving ChronometervsLum-Tec RPM

At a glance

Full specifications

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