Side by side
Borealis Watch Co. Sea Storm MK2 GMTvsTudor Black Bay
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
Black Bay41mm
Power Reserve
Sea Storm MK2 GMT40h
Black Bay70h
Water Resistance
Sea Storm MK2 GMT300m
Black Bay200m
MSRP
Sea Storm MK2 GMT$415
Black Bay—
Full specifications
Case
7 specsDiameter
41.50mm
41mm
Thickness
14.15mm
14.7mm
Lug-to-Lug
48.50mm
46mm
Lug Width
20mm
22mm
Finish
Brushed and polished
Polished + Satin
Water Resistance
300m
200m
Caseback
Solid
Engraved
Crystal & Dial
1 specsLume
BGW9
None
Movement
2 specsCaliber
NH34
MT5602
Power Reserve
40h
70h
Pricing
1 specsMSRP
$415
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