Side by side
Borealis Watch Co. Sea Storm MK2 GMTvsGrand Seiko SBGR261
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
11 of 29 specs differDiameter
Sea Storm MK2 GMT41.50mm
SBGR26139.5mm
Power Reserve
Sea Storm MK2 GMT40h
SBGR26172h
Water Resistance
Sea Storm MK2 GMT300m
SBGR26130m
MSRP
Sea Storm MK2 GMT$415
SBGR261$4,900
Full specifications
Case
6 specsCategory
Diver
Dress
Diameter
41.50mm
39.5mm
Thickness
14.15mm
13.1mm
Lug-to-Lug
48.50mm
46.9mm
Lug Width
20mm
19mm
Water Resistance
300m
30m
Crystal & Dial
2 specsAR Coating
Inner
Yes
Lume
BGW9
None
Movement
2 specsCaliber
NH34
9S65
Power Reserve
40h
72h
Pricing
1 specsMSRP
$415
$4,900
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