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

At MSRP the Spinnaker Challenger Automatic is the cheaper of the two at $289, against $415 for the Borealis Watch Co. Sea Storm MK2 GMT — a $126 gap before any retailer discounting.

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

The Spinnaker Challenger 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 Challenger Automatic?

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

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

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

Side by side

Borealis Watch Co. Sea Storm MK2 GMTvsSpinnaker Challenger 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 Challenger Automatic

challenger-automatic-depth-blue-sp-5159-11

MSRP $289

At a glance

10 of 29 specs differ

Diameter

Sea Storm MK2 GMT41.50mm

Challenger Automatic42mm

Power Reserve

Sea Storm MK2 GMT40h

Challenger Automatic40h

Water Resistance

Sea Storm MK2 GMT300m

Challenger Automatic200m

MSRP

Sea Storm MK2 GMT$415

Challenger Automatic$289

Full specifications

Case

6 specs

Diameter

41.50mm

42mm

Thickness

14.15mm

19mm

Lug-to-Lug

48.50mm

49.5mm

Lug Width

20mm

22mm

Material

Stainless Steel

316L Stainless Steel

Water Resistance

300m

200m

Crystal & Dial

2 specs

Dial Color

Black

Blue

Lume

BGW9

None

Movement

1 specs

Caliber

NH34

SII NH35A

Pricing

1 specs

MSRP

$415

$289

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