Side by side
Borealis Watch Co. Sea Storm MK2 GMTvsSheffield 1A 40mm
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
10 of 29 specs differDiameter
Sea Storm MK2 GMT41.50mm
1A 40mm40mm
Power Reserve
Sea Storm MK2 GMT40h
1A 40mm40h
Water Resistance
Sea Storm MK2 GMT300m
1A 40mm200m
MSRP
Sea Storm MK2 GMT$415
1A 40mm$228
Full specifications
Case
6 specsCategory
Diver
—
Diameter
41.50mm
40mm
Thickness
14.15mm
13mm
Lug-to-Lug
48.50mm
48mm
Lug Width
20mm
20mm
Water Resistance
300m
200m
Crystal & Dial
2 specsDial Color
Black
—
Lume
BGW9
None
Movement
1 specsCaliber
NH34
Seiko NH35
Pricing
1 specsMSRP
$415
$228
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