Side by side
Borealis Watch Co. Caloura 300mvsSeiko 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
Caloura 300m42mm
Prospex Sea41.3mm
Power Reserve
Caloura 300m40h
Prospex Sea72h
Water Resistance
Caloura 300m300m
Prospex Sea300m
MSRP
Caloura 300m$275
Prospex Sea$1,100
Full specifications
Case
4 specsDiameter
42mm
41.3mm
Thickness
13.9mm
12.5mm
Lug-to-Lug
44.20mm
48.2mm
Lug Width
22mm
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
NH35
6R55
Power Reserve
40h
72h
Jewels
25
24
Pricing
1 specsMSRP
$275
$1,100
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