Side by side
Borealis Watch Co. Sea Storm MK2 GMTvsGrand Seiko SLGA015
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
12 of 29 specs differDiameter
Sea Storm MK2 GMT41.50mm
SLGA01543.8mm
Power Reserve
Sea Storm MK2 GMT40h
SLGA015120h
Water Resistance
Sea Storm MK2 GMT300m
SLGA015200m
MSRP
Sea Storm MK2 GMT$415
SLGA015$12,600
Full specifications
Case
6 specsDiameter
41.50mm
43.8mm
Thickness
14.15mm
13.8mm
Lug-to-Lug
48.50mm
51.5mm
Lug Width
20mm
23mm
Material
Stainless Steel
Titanium
Water Resistance
300m
200m
Crystal & Dial
2 specsAR Coating
Inner
Yes
Lume
BGW9
None
Movement
3 specsCaliber
NH34
9RA5
Type
Automatic
Spring Drive
Power Reserve
40h
120h
Pricing
1 specsMSRP
$415
$12,600
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