Side by side
Borealis Watch Co. Sea Storm MK2 GMTvsSinn U18
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
15 of 29 specs differDiameter
Sea Storm MK2 GMT41.50mm
U1844mm
Power Reserve
Sea Storm MK2 GMT40h
U1842h
Water Resistance
Sea Storm MK2 GMT300m
U182,000m
MSRP
Sea Storm MK2 GMT$415
U18$3,488
Full specifications
Case
8 specsDiameter
41.50mm
44mm
Thickness
14.15mm
15.5mm
Lug-to-Lug
48.50mm
—
Lug Width
20mm
22mm
Material
Stainless Steel
high-strength
Finish
Brushed and polished
—
Water Resistance
300m
2000m
Caseback
Solid
—
Crystal & Dial
4 specsCrystal Shape
Flat
—
AR Coating
Inner
—
Indices
Applied
—
Lume
BGW9
None
Movement
2 specsCaliber
Seiko NH34
Sellita SW300-1
Power Reserve
40h
42h
Pricing
1 specsMSRP
$415
$3,488
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