Which is cheaper, the Lum-Tec RPM or the Spinnaker Bradner GMT?

At MSRP the Spinnaker Bradner GMT is the cheaper of the two at $299, against $495 for the Lum-Tec RPM — a $196 gap before any retailer discounting.

Which is bigger, the Lum-Tec RPM or the Spinnaker Bradner GMT?

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

Which has better water resistance, the Lum-Tec RPM or the Spinnaker Bradner GMT?

The Spinnaker Bradner GMT is rated to 180m versus 50m for the Lum-Tec RPM.

What movement does the Lum-Tec RPM run compared to the Spinnaker Bradner GMT?

The Lum-Tec RPM runs a quartz caliber, while the Spinnaker Bradner GMT runs a automatic (Seiko NH34A).

Side by side

Lum-Tec RPMvsSpinnaker Bradner GMT

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

Lum-Tec RPM

rpm-3

MSRP $495

Spinnaker Bradner GMT

bradner-gmt-automatic-abbott-brown-sp-5121-22

MSRP $299

At a glance

11 of 29 specs differ

Diameter

RPM43mm

Bradner GMT42mm

Power Reserve

RPM40h

Bradner GMT40h

Water Resistance

RPM50m

Bradner GMT180m

MSRP

RPM$495

Bradner GMT$299

Full specifications

Case

7 specs

Crystal & Dial

1 specs

Dial Color

RPM 3

Brown

Movement

2 specs

Caliber

—

Seiko NH34A

Type

Quartz

Automatic

Pricing

1 specs

MSRP

$495

$299

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Lum-Tec RPMvsSpinnaker Bradner GMT

At a glance

Full specifications

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