Side by side

Borealis Watch Co. Sea Storm MK2 GMTvsGrand Seiko SBGM221

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

Sea Storm MK2 GMT
Borealis Watch Co.Sea Storm MK2 GMT
MSRP $415
SBGM221
Grand SeikoSBGM221
MSRP $5,400

At a glance

11 of 29 specs differ
Diameter
Sea Storm MK2 GMT41.50mm
SBGM22139.5mm
Power Reserve
Sea Storm MK2 GMT40h
SBGM22172h
Water Resistance
Sea Storm MK2 GMT300m
SBGM22130m
MSRP
Sea Storm MK2 GMT$415
SBGM221$5,400

Full specifications

Case

6 specs
Category
Diver
GMT
Diameter
41.50mm
39.5mm
Thickness
14.15mm
13.7mm
Lug-to-Lug
48.50mm
46.9mm
Lug Width
20mm
19mm
Water Resistance
300m
30m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Lume
BGW9
None

Movement

2 specs
Caliber
NH34
9S66
Power Reserve
40h
72h

Pricing

1 specs
MSRP
$415
$5,400

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