Side by side
Borealis Watch Co. Sea Storm MK2 GMTvsSeiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
11 of 29 specs differDiameter
Sea Storm MK2 GMT41.50mm
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch42.6mm
Power Reserve
Sea Storm MK2 GMT40h
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch72h
Water Resistance
Sea Storm MK2 GMT300m
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch300m
MSRP
Sea Storm MK2 GMT$415
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch$3,600
Full specifications
Case
4 specsDiameter
41.50mm
42.6mm
Thickness
14.15mm
14.1mm
Lug-to-Lug
48.50mm
49.3mm
Lug Width
20mm
20mm
Crystal & Dial
3 specsCrystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Lume
BGW9
LumiBrite on hands, index(es) and bezel
Movement
3 specsCaliber
NH34
8L45
Power Reserve
40h
72h
Jewels
25
35
Pricing
1 specsMSRP
$415
$3,600
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