Which is cheaper, the Borealis Watch Co. Sea Storm MK2 GMT or the Spinnaker Dumas GMT?

At MSRP the Spinnaker Dumas GMT is the cheaper of the two at $399, against $415 for the Borealis Watch Co. Sea Storm MK2 GMT — a $16 gap before any retailer discounting.

Which is bigger, the Borealis Watch Co. Sea Storm MK2 GMT or the Spinnaker Dumas GMT?

The Spinnaker Dumas GMT wears larger at 44mm versus 41.50mm for the Borealis Watch Co. Sea Storm MK2 GMT — a 2.5mm difference across the dial.

What movement does the Borealis Watch Co. Sea Storm MK2 GMT run compared to the Spinnaker Dumas GMT?

Both watches run automatic movements — the Borealis Watch Co. Sea Storm MK2 GMT uses the NH34 and the Spinnaker Dumas GMT uses the Seiko NH34A.

Side by side

Borealis Watch Co. Sea Storm MK2 GMTvsSpinnaker Dumas GMT

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

Borealis Watch Co.Sea Storm MK2 GMT

borealis-sea-storm-mk2-gmt-version-aa

MSRP $415

Spinnaker Dumas GMT

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

MSRP $399

At a glance

10 of 29 specs differ

Diameter

Sea Storm MK2 GMT41.50mm

Dumas GMT44mm

Power Reserve

Sea Storm MK2 GMT40h

Dumas GMT40h

Water Resistance

Sea Storm MK2 GMT300m

Dumas GMT300m

MSRP

Sea Storm MK2 GMT$415

Dumas GMT$399

Full specifications

Case

6 specs

Crystal & Dial

2 specs

Dial Color

Black

Blue

Lume

BGW9

None

Movement

1 specs

Caliber

NH34

Seiko NH34A

Pricing

1 specs

MSRP

$415

$399

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