Which is cheaper, the Borealis Watch Co. Sea Storm MK2 GMT or the Seiko Prospex Sea?

At MSRP the Borealis Watch Co. Sea Storm MK2 GMT is the cheaper of the two at $415, against $595 for the Seiko Prospex Sea — a $180 gap before any retailer discounting.

Which is bigger, the Borealis Watch Co. Sea Storm MK2 GMT or the Seiko Prospex Sea?

The Seiko Prospex Sea wears larger at 41.7mm versus 41.50mm for the Borealis Watch Co. Sea Storm MK2 GMT — a 0.2mm difference across the dial.

Which has better water resistance, the Borealis Watch Co. Sea Storm MK2 GMT or the Seiko Prospex Sea?

The Borealis Watch Co. Sea Storm MK2 GMT is rated to 300m versus 200m for the Seiko Prospex Sea.

Which has a longer power reserve, the Borealis Watch Co. Sea Storm MK2 GMT or the Seiko Prospex Sea?

The Seiko Prospex Sea carries a 41-hour power reserve against 40 hours on the Borealis Watch Co. Sea Storm MK2 GMT.

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

Both watches run automatic movements — the Borealis Watch Co. Sea Storm MK2 GMT uses the NH34 and the Seiko Prospex Sea uses the 4R35.

Side by side

Borealis Watch Co. Sea Storm MK2 GMTvsSeiko Prospex Sea

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

Seiko Prospex Sea

srpl11

MSRP $595

At a glance

11 of 29 specs differ

Diameter

Sea Storm MK2 GMT41.50mm

Prospex Sea41.7mm

Power Reserve

Sea Storm MK2 GMT40h

Prospex Sea41h

Water Resistance

Sea Storm MK2 GMT300m

Prospex Sea200m

MSRP

Sea Storm MK2 GMT$415

Prospex Sea$595

Full specifications

Case

5 specs

Diameter

41.50mm

41.7mm

Thickness

14.15mm

12.3mm

Lug-to-Lug

48.50mm

49.5mm

Lug Width

20mm

Water Resistance

300m

200m

Crystal & Dial

2 specs

Crystal

Sapphire

Hardlex

Lume

BGW9

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

NH34

4R35

Power Reserve

40h

41h

Jewels

Pricing

1 specs

MSRP

$415

$595

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