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

At MSRP the Spinnaker Cahill Automatic is the cheaper of the two at $350, against $415 for the Borealis Watch Co. Sea Storm MK2 GMT — a $65 gap before any retailer discounting.

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

The Spinnaker Cahill Automatic wears larger at 42mm versus 41.50mm for the Borealis Watch Co. Sea Storm MK2 GMT — a 0.5mm difference across the dial.

Which has better water resistance, the Borealis Watch Co. Sea Storm MK2 GMT or the Spinnaker Cahill Automatic?

The Borealis Watch Co. Sea Storm MK2 GMT is rated to 300m versus 200m for the Spinnaker Cahill Automatic.

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

Both watches run automatic movements — the Borealis Watch Co. Sea Storm MK2 GMT uses the NH34 and the Spinnaker Cahill Automatic uses the SII NH35A.

Side by side

Borealis Watch Co. Sea Storm MK2 GMTvsSpinnaker Cahill Automatic

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 Cahill Automatic

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

MSRP $350

At a glance

10 of 29 specs differ

Diameter

Sea Storm MK2 GMT41.50mm

Cahill Automatic42mm

Power Reserve

Sea Storm MK2 GMT40h

Cahill Automatic40h

Water Resistance

Sea Storm MK2 GMT300m

Cahill Automatic200m

MSRP

Sea Storm MK2 GMT$415

Cahill Automatic$350

Full specifications

Case

6 specs

Diameter

41.50mm

42mm

Thickness

14.15mm

13.7mm

Lug-to-Lug

48.50mm

51mm

Lug Width

20mm

22mm

Material

Stainless Steel

316L Stainless Steel

Water Resistance

300m

200m

Crystal & Dial

2 specs

Dial Color

Black

Green

Lume

BGW9

None

Movement

1 specs

Caliber

NH34

SII NH35A

Pricing

1 specs

MSRP

$415

$350

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