Side by side
Borealis Watch Co. Sea Storm MK2 GMTvsSeiko Prospex Sea
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
10 of 29 specs differDiameter
Sea Storm MK2 GMT41.50mm
Prospex Sea41.3mm
Power Reserve
Sea Storm MK2 GMT40h
Prospex Sea72h
Water Resistance
Sea Storm MK2 GMT300m
Prospex Sea300m
MSRP
Sea Storm MK2 GMT$415
Prospex Sea$1,100
Full specifications
Case
4 specsDiameter
41.50mm
41.3mm
Thickness
14.15mm
12.5mm
Lug-to-Lug
48.50mm
48.2mm
Lug Width
20mm
20mm
Crystal & Dial
2 specsAR Coating
Inner
Anti-reflective coating on inner surface
Lume
BGW9
LumiBrite on hands, index(es) and bezel
Movement
3 specsCaliber
NH34
6R55
Power Reserve
40h
72h
Jewels
25
24
Pricing
1 specsMSRP
$415
$1,100
Follow this matchup
Get a note when Borealis Watch Co. Sea Storm MK2 GMT vs Seiko Prospex Sea gets more votes, a community discussion, or a price drop. No account needed.
More watches worth a look
Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.
People also compared
Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.
Borealis Watch Co. Sea Storm MK2vsSeiko Prospex SeaChristopher Ward C60 LympstonevsSeiko Prospex SeaBoldr MarinevsSeiko Prospex SeaGeckota PhalanxvsSeiko Prospex SeaBorealis Watch Co. Estoril 300 GMTvsBorealis Watch Co. Sea Storm MK2 GMTBorealis Watch Co. Porto CovovsBorealis Watch Co. Sea Storm MK2 GMT