Side by side
Borealis Watch Co. Caloura 300mvsSeiko Prospex Sea 1968 Heritage Diver's GMT
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
11 of 29 specs differDiameter
Caloura 300m42mm
Prospex Sea 1968 Heritage Diver's GMT42mm
Power Reserve
Caloura 300m40h
Prospex Sea 1968 Heritage Diver's GMT72h
Water Resistance
Caloura 300m300m
Prospex Sea 1968 Heritage Diver's GMT200m
MSRP
Caloura 300m$275
Prospex Sea 1968 Heritage Diver's GMT$1,500
Full specifications
Case
5 specsDiameter
42mm
42mm
Thickness
13.9mm
12.9mm
Lug-to-Lug
44.20mm
48.6mm
Lug Width
22mm
20mm
Water Resistance
300m
200m
Crystal & Dial
2 specsAR Coating
Inner
Anti-reflective coating on inner surface
Lume
BGW9
LumiBrite on hands, index(es) and bezel
Movement
3 specsCaliber
NH35
6R54
Power Reserve
40h
72h
Jewels
25
24
Pricing
1 specsMSRP
$275
$1,500
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