Side by side
Borealis Watch Co. Sea Storm MK2 GMTvsSeestern 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 MK2 GMT41.50mm
S456 GMT41mm
Power Reserve
Sea Storm MK2 GMT40h
S456 GMT41hh
Water Resistance
Sea Storm MK2 GMT300m
S456 GMT200m
MSRP
Sea Storm MK2 GMT$415
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
NH34
Seiko NH34
Beat Rate
28,800 vph
3 vph
Power Reserve
40h
41hh
Jewels
25
24
Complications
None
GMT
Pricing
1 specsMSRP
$415
$299
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