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
12 of 29 specs differDiameter
Caloura 300m42mm
Prospex Sea43.5mm
Power Reserve
Caloura 300m40h
Prospex Sea70h
Water Resistance
Caloura 300m300m
Prospex Sea200m
MSRP
Caloura 300m$275
Prospex Sea$1,500
Full specifications
Case
6 specsDiameter
42mm
43.5mm
Thickness
13.9mm
13.3mm
Lug-to-Lug
44.20mm
51mm
Lug Width
22mm
22mm
Material
Stainless Steel
Titanium
Water Resistance
300m
200m
Crystal & Dial
2 specsAR Coating
Inner
Anti-reflective coating on inner surface
Lume
BGW9
LumiBrite on hands and index(es)
Movement
3 specsCaliber
NH35
6R35
Power Reserve
40h
70h
Jewels
25
24
Pricing
1 specsMSRP
$275
$1,500
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