Side by side
Borealis Watch Co. Sea Storm MK2vsSeestern S456 GMT
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
16 of 29 specs differDiameter
Sea Storm MK241.50mm
S456 GMT41mm
Power Reserve
Sea Storm MK240h
S456 GMT41hh
Water Resistance
Sea Storm MK2300m
S456 GMT200m
MSRP
Sea Storm MK2$475
S456 GMT$299
Full specifications
Case
8 specsCategory
Diver
GMT
Diameter
41.50mm
41mm
Thickness
14.15mm
13mm
Lug-to-Lug
48.50mm
49mm
Lug Width
20mm
20mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed and polished
Brushed + Polished
Water Resistance
300m
200m
Crystal & Dial
2 specsDial Color
Black
Sunray style, applied and Diamond cut Indices, C1 lume
Lume
BGW9
C1
Movement
5 specsCaliber
NH38
Seiko NH34
Beat Rate
28,800 vph
3 vph
Power Reserve
40h
41hh
Jewels
25
24
Complications
None
GMT
Pricing
1 specsMSRP
$475
$299
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