Side by side
Borealis Watch Co. Sea Storm MK2 GMTvsFormex Reef 39.5 mm
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
9 of 29 specs differDiameter
Sea Storm MK2 GMT41.50mm
Reef 39.5 mm39.5mm
Power Reserve
Sea Storm MK2 GMT40h
Reef 39.5 mm56h
Water Resistance
Sea Storm MK2 GMT300m
Reef 39.5 mm300m
MSRP
Sea Storm MK2 GMT$415
Reef 39.5 mm$2,230
Full specifications
Case
4 specsDiameter
41.50mm
39.5mm
Thickness
14.15mm
11mm
Lug-to-Lug
48.50mm
45.5mm
Lug Width
20mm
22mm
Crystal & Dial
2 specsDial Color
Black
Bahama Blue
Lume
BGW9
Super-LumiNova
Movement
2 specsCaliber
NH34
Sellita SW300-1
Power Reserve
40h
56h
Pricing
1 specsMSRP
$415
$2,230
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