Which is cheaper, the Borealis Watch Co. Sea Storm MK2 GMT or the Grand Seiko STGF387?

At MSRP the Borealis Watch Co. Sea Storm MK2 GMT is the cheaper of the two at $415, against $4,200 for the Grand Seiko STGF387 — a $3,785 gap before any retailer discounting.

Which is bigger, the Borealis Watch Co. Sea Storm MK2 GMT or the Grand Seiko STGF387?

The Borealis Watch Co. Sea Storm MK2 GMT wears larger at 41.50mm versus 26mm for the Grand Seiko STGF387 — a 15.5mm difference across the dial.

Which has better water resistance, the Borealis Watch Co. Sea Storm MK2 GMT or the Grand Seiko STGF387?

The Borealis Watch Co. Sea Storm MK2 GMT is rated to 300m versus 100m for the Grand Seiko STGF387.

What movement does the Borealis Watch Co. Sea Storm MK2 GMT run compared to the Grand Seiko STGF387?

The Borealis Watch Co. Sea Storm MK2 GMT runs a automatic caliber (NH34), while the Grand Seiko STGF387 runs a quartz (4J51).

Side by side

Borealis Watch Co. Sea Storm MK2 GMTvsGrand Seiko STGF387

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

Grand Seiko STGF387

stgf387g

MSRP $4,200

At a glance

11 of 29 specs differ

Diameter

Sea Storm MK2 GMT41.50mm

STGF38726mm

Power Reserve

Sea Storm MK2 GMT40h

STGF38740h

Water Resistance

Sea Storm MK2 GMT300m

STGF387100m

MSRP

Sea Storm MK2 GMT$415

STGF387$4,200

Full specifications

Case

6 specs

Crystal & Dial

2 specs

AR Coating

Inner

Yes

Lume

BGW9

None

Movement

2 specs

Caliber

NH34

4J51

Type

Automatic

Quartz

Pricing

1 specs

MSRP

$415

$4,200

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