Side by side
Borealis Watch Co. Sea Storm MK2 GMTvsSeestern Sub 300 V4
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
17 of 29 specs differDiameter
Sea Storm MK2 GMT41.50mm
Sub 300 V442mm
Power Reserve
Sea Storm MK2 GMT40h
Sub 300 V441h
Water Resistance
Sea Storm MK2 GMT300m
Sub 300 V4200m
MSRP
Sea Storm MK2 GMT$415
Sub 300 V4$10
Full specifications
Case
8 specsDiameter
41.50mm
42mm
Thickness
14.15mm
13mm
Lug-to-Lug
48.50mm
46mm
Lug Width
20mm
20mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed and polished
Brushed + Sandblasted
Water Resistance
300m
200m
Caseback
Solid
Solid screw-down
Crystal & Dial
3 specsAR Coating
Inner
Underside
Dial Color
Black
Orange
Lume
BGW9
Japan Lume (blue glow)
Movement
5 specsCaliber
NH34
Seiko NH35A
Beat Rate
28,800 vph
21,600 vph
Power Reserve
40h
41h
Jewels
25
24
Complications
None
GMT, Date
Pricing
1 specsMSRP
$415
$10
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