Which is cheaper, the Lum-Tec RPM or the Grand Seiko STGK003?

At MSRP the Lum-Tec RPM is the cheaper of the two at $495, against $31,200 for the Grand Seiko STGK003 — a $30,705 gap before any retailer discounting.

Which is bigger, the Lum-Tec RPM or the Grand Seiko STGK003?

The Lum-Tec RPM wears larger at 43mm versus 28.7mm for the Grand Seiko STGK003 — a 14.3mm difference across the dial.

Which has better water resistance, the Lum-Tec RPM or the Grand Seiko STGK003?

The Grand Seiko STGK003 is rated to 100m versus 50m for the Lum-Tec RPM.

Which has a longer power reserve, the Lum-Tec RPM or the Grand Seiko STGK003?

The Grand Seiko STGK003 carries a 50-hour power reserve against 40 hours on the Lum-Tec RPM.

What movement does the Lum-Tec RPM run compared to the Grand Seiko STGK003?

The Lum-Tec RPM runs a quartz caliber, while the Grand Seiko STGK003 runs a automatic (9S27).

Side by side

Lum-Tec RPMvsGrand Seiko STGK003

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

Lum-Tec RPM

rpm-3

MSRP $495

Grand Seiko STGK003

stgk003j

MSRP $31,200

At a glance

13 of 29 specs differ

Diameter

RPM43mm

STGK00328.7mm

Power Reserve

RPM40h

STGK00350h

Water Resistance

RPM50m

STGK003100m

MSRP

RPM$495

STGK003$31,200

Full specifications

Case

7 specs

Crystal & Dial

2 specs

AR Coating

Inner

Yes

Dial Color

RPM 3

Black

Movement

3 specs

Caliber

—

9S27

Type

Quartz

Automatic

Power Reserve

40h

50h

Pricing

1 specs

MSRP

$495

$31,200

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Lum-Tec RPMvsGrand Seiko STGK003

At a glance

Full specifications

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