Which is cheaper, the Decima Gatekeeper or the Spinnaker Dumas GMT?

At MSRP the Spinnaker Dumas GMT is the cheaper of the two at $399, against $599 for the Decima Gatekeeper — a $200 gap before any retailer discounting.

Which is bigger, the Decima Gatekeeper or the Spinnaker Dumas GMT?

The Spinnaker Dumas GMT wears larger at 44mm versus 38mm for the Decima Gatekeeper — a 6mm difference across the dial.

Which has better water resistance, the Decima Gatekeeper or the Spinnaker Dumas GMT?

The Spinnaker Dumas GMT is rated to 300m versus 50m for the Decima Gatekeeper.

Which has a longer power reserve, the Decima Gatekeeper or the Spinnaker Dumas GMT?

The Decima Gatekeeper carries a 42-hour power reserve against 40 hours on the Spinnaker Dumas GMT.

What movement does the Decima Gatekeeper run compared to the Spinnaker Dumas GMT?

Both watches run automatic movements — the Decima Gatekeeper uses the Miyota 9039 and the Spinnaker Dumas GMT uses the Seiko NH34A.

Side by side

Decima GatekeepervsSpinnaker Dumas GMT

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

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Decima Gatekeeper

gatekeeper-white

MSRP $599

Spinnaker Dumas GMT

dumas-gmt-automatic-ocean-blue-sp-5119-55

MSRP $399

At a glance

12 of 29 specs differ

Diameter

Gatekeeper38mm

Dumas GMT44mm

Power Reserve

Gatekeeper42h

Dumas GMT40h

Water Resistance

Gatekeeper50m

Dumas GMT300m

MSRP

Gatekeeper$599

Dumas GMT$399

Full specifications

Case

7 specs

Crystal & Dial

2 specs

AR Coating

Yes

Inner

Dial Color

White

Blue

Movement

2 specs

Caliber

Miyota 9039

Seiko NH34A

Power Reserve

42h

40h

Pricing

1 specs

MSRP

$599

$399

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Decima GatekeepervsSpinnaker Dumas GMT

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