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

At MSRP the Borealis Watch Co. Sea Storm MK2 GMT is the cheaper of the two at $415, against $725 for the Seiko Prospex SPEEDTIMER — a $310 gap before any retailer discounting.

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

The Borealis Watch Co. Sea Storm MK2 GMT wears larger at 41.50mm versus 39mm for the Seiko Prospex SPEEDTIMER — a 2.5mm difference across the dial.

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

The Borealis Watch Co. Sea Storm MK2 GMT is rated to 300m versus 10m for the Seiko Prospex SPEEDTIMER.

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

The Borealis Watch Co. Sea Storm MK2 GMT runs a automatic caliber (NH34), while the Seiko Prospex SPEEDTIMER runs a quartz (V192).

Side by side

Borealis Watch Co. Sea Storm MK2 GMTvsSeiko Prospex SPEEDTIMER

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 SPEEDTIMER

ssc813

MSRP $725

At a glance

12 of 29 specs differ

Diameter

Sea Storm MK2 GMT41.50mm

Prospex SPEEDTIMER39mm

Power Reserve

Sea Storm MK2 GMT40h

Prospex SPEEDTIMER40h

Water Resistance

Sea Storm MK2 GMT300m

Prospex SPEEDTIMER100m

MSRP

Sea Storm MK2 GMT$415

Prospex SPEEDTIMER$725

Full specifications

Case

6 specs

Crystal & Dial

3 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Lume

BGW9

LumiBrite on hands and index(es)

Movement

2 specs

Caliber

NH34

V192

Type

Automatic

Quartz

Pricing

1 specs

MSRP

$415

$725

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