Side by side
Borealis Watch Co. Porto CovovsCIGA Design BLACK STAR
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
13 of 29 specs differDiameter
Porto Covo40mm
BLACK STAR46mm
Power Reserve
Porto Covo40h
BLACK STAR41h
Water Resistance
Porto Covo300m
BLACK STAR30m
MSRP
Porto Covo$415
BLACK STAR$1,980
Full specifications
Case
7 specsCategory
Diver
Chronograph
Diameter
40mm
46mm
Thickness
11.6mm
15.6mm
Lug-to-Lug
42.5mm
—
Lug Width
20mm
22mm
Material
Stainless Steel
Titanium
Water Resistance
300m
30m
Crystal & Dial
2 specsDial Color
Black
—
Lume
BGW9
Swiss Super-LumiNova
Movement
3 specsCaliber
Miyota 9039
CD-04-S
Power Reserve
40h
41h
Jewels
25
26
Pricing
1 specsMSRP
$415
$1,980
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