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Borealis Watch Co. Sea Storm MK2 GMTvsGrand Seiko SBGA413

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

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Sea Storm MK2 GMT
Borealis Watch Co.Sea Storm MK2 GMT
MSRP $415
SBGA413
Grand SeikoSBGA413
MSRP $7,200
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Buy used on eBay ↗
Buy from Grand Seiko ↗
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At a glance

13 of 29 specs differ
Diameter
Sea Storm MK2 GMT41.50mm
SBGA41340mm
Power Reserve
Sea Storm MK2 GMT40h
SBGA41372h
Water Resistance
Sea Storm MK2 GMT300m
SBGA413100m
MSRP
Sea Storm MK2 GMT$415
SBGA413$7,200

Full specifications

Case

7 specs
Category
Diver
Dress
Diameter
41.50mm
40mm
Thickness
14.15mm
12.8mm
Lug-to-Lug
48.50mm
47mm
Lug Width
20mm
21mm
Material
Stainless Steel
Titanium
Water Resistance
300m
100m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Lume
BGW9
None

Movement

3 specs
Caliber
NH34
9R65
Type
Automatic
Spring Drive
Power Reserve
40h
72h

Pricing

1 specs
MSRP
$415
$7,200
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