Which is cheaper, the Lum-Tec RPM or the Spinnaker Cahill Automatic?

At MSRP the Spinnaker Cahill Automatic is the cheaper of the two at $350, against $495 for the Lum-Tec RPM — a $145 gap before any retailer discounting.

Which is bigger, the Lum-Tec RPM or the Spinnaker Cahill Automatic?

The Lum-Tec RPM wears larger at 43mm versus 42mm for the Spinnaker Cahill Automatic — a 1mm difference across the dial.

Which has better water resistance, the Lum-Tec RPM or the Spinnaker Cahill Automatic?

The Spinnaker Cahill Automatic is rated to 200m versus 50m for the Lum-Tec RPM.

What movement does the Lum-Tec RPM run compared to the Spinnaker Cahill Automatic?

The Lum-Tec RPM runs a quartz caliber, while the Spinnaker Cahill Automatic runs a automatic (SII NH35A).

Side by side

Lum-Tec RPMvsSpinnaker Cahill Automatic

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

Lum-Tec RPM

rpm-3

MSRP $495

Spinnaker Cahill Automatic

cahill-automatic-moss-green-sp-5064-02

MSRP $350

At a glance

11 of 29 specs differ

Diameter

RPM43mm

Cahill Automatic42mm

Power Reserve

RPM40h

Cahill Automatic40h

Water Resistance

RPM50m

Cahill Automatic200m

MSRP

RPM$495

Cahill Automatic$350

Full specifications

Case

7 specs

Crystal & Dial

1 specs

Dial Color

RPM 3

Green

Movement

2 specs

Caliber

—

SII NH35A

Type

Quartz

Automatic

Pricing

1 specs

MSRP

$495

$350

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Lum-Tec RPMvsSpinnaker Cahill Automatic

At a glance

Full specifications

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