Side by side
Borealis Watch Co. Sea Storm MK2 GMTvsLongines PrimaLuna
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
21 of 29 specs differDiameter
Sea Storm MK2 GMT41.50mm
PrimaLuna34mm
Power Reserve
Sea Storm MK2 GMT40h
PrimaLuna72h
Water Resistance
Sea Storm MK2 GMT300m
PrimaLuna30m
MSRP
Sea Storm MK2 GMT$415
PrimaLuna$2,950
Full specifications
Case
8 specsCategory
Diver
Dress
Diameter
41.50mm
34mm
Thickness
14.15mm
11.6mm
Lug-to-Lug
48.50mm
41mm
Lug Width
20mm
8mm
Finish
Brushed and polished
—
Water Resistance
300m
30m
Caseback
Solid
Transparent case back with sapphire crystal
Crystal & Dial
5 specsCrystal Shape
Flat
—
AR Coating
Inner
Both sides
Dial Color
Black
Blue
Indices
Applied
Diamond indexes
Lume
BGW9
Super-LumiNova
Movement
7 specsCaliber
NH34
L899.5
Beat Rate
28,800 vph
25,200 vph
Power Reserve
40h
72h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
Hours, minutes, seconds and date, Moon phase display at 6 o'clock
Pricing
1 specsMSRP
$415
$2,950
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