Side by side
Borealis Watch Co. Sea Storm MK2 GMTvsMaen Grand Tonneau Ultra Thin
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
Grand Tonneau Ultra Thin34mm
Power Reserve
Sea Storm MK2 GMT40h
Grand Tonneau Ultra Thin40h
Water Resistance
Sea Storm MK2 GMT300m
Grand Tonneau Ultra Thin50m
MSRP
Sea Storm MK2 GMT$415
Grand Tonneau Ultra Thin$1,519
Full specifications
Case
7 specsCategory
Diver
Dress
Diameter
41.50mm
34mm
Thickness
14.15mm
6.4mm
Lug-to-Lug
48.50mm
—
Lug Width
20mm
—
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
50m
Crystal & Dial
2 specsDial Color
Black
MNL.04
Lume
BGW9
None
Movement
1 specsCaliber
NH34
—
Pricing
1 specsMSRP
$415
$1,519
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