Side by side
Borealis Watch Co. Sea Storm MK2 GMTvsGrand Seiko SBGK006
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
The bottom line
The 39mm SBGK006 wears 2.5mm narrower than the 41.50mm Sea Storm MK2 GMT — noticeable on a 6.5" wrist.
Check prices & track
Borealis Watch Co. Sea Storm MK2 GMT
MSRP $415
Grand Seiko SBGK006
MSRP $22,200
At a glance
13 of 29 specs differDiameter
Sea Storm MK2 GMT41.50mm
SBGK00639mm
Power Reserve
Sea Storm MK2 GMT40h
SBGK00672h
Water Resistance
Sea Storm MK2 GMT300m
SBGK00630m
MSRP
Sea Storm MK2 GMT$415
SBGK006$22,200
Full specifications
Case
7 specsCategory
Diver
Dress
Diameter
41.50mm
39mm
Thickness
14.15mm
11.6mm
Lug-to-Lug
48.50mm
44mm
Lug Width
20mm
19mm
Material
Stainless Steel
Gold
Water Resistance
300m
30m
Crystal & Dial
2 specsAR Coating
Inner
Yes
Lume
BGW9
None
Movement
3 specsCaliber
NH34
9S63
Type
Automatic
Manual
Power Reserve
40h
72h
Pricing
1 specsMSRP
$415
$22,200
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