Side by side

Borealis Watch Co. Porto CovovsZelos Skyraider 40 Skeleton

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Porto Covo
Borealis Watch Co.Porto Covo
MSRP $415
Skyraider 40 Skeleton
ZelosSkyraider 40 Skeleton
MSRP $1,999

At a glance

12 of 29 specs differ
Diameter
Porto Covo40mm
Skyraider 40 Skeleton40mm
Power Reserve
Porto Covo40h
Skyraider 40 Skeleton40h
Water Resistance
Porto Covo300m
Skyraider 40 Skeleton50m
MSRP
Porto Covo$415
Skyraider 40 Skeleton$1,999

Full specifications

Case

7 specs
Category
Diver
Skeleton
Diameter
40mm
40mm
Thickness
11.6mm
8.2mm
Lug-to-Lug
42.5mm
40mm
Lug Width
20mm
20mm
Material
Stainless Steel
Titanium
Water Resistance
300m
50m

Crystal & Dial

2 specs
Dial Color
Black
Ti Damascus LE
Lume
BGW9
None

Movement

2 specs
Caliber
Miyota 9039
Swiss Skeletonised Marvin 700
Type
Automatic
Manual

Pricing

1 specs
MSRP
$415
$1,999

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Borealis Watch Co. Porto Covo

The Borealis Porto Covo is widely praised for its 39mm size and unique cantilevered indices that create a 3D effect and depth. Owners note the indices' floating appearance is a well-executed design. One owner reported poor accuracy and a terse customer service response, while another wished for a 42mm size option. The $395 price is considered reasonable for a microbrand, though some feel it does not compare favorably to AliExpress options. Overall, owners appreciate the Borealis Porto Covo for its distinctive dial design and wearable 39mm case size.

Zelos Skyraider 40 Skeleton

The Zelos Skyraider 40 Skeleton is noted for its skeletonized dial and the use of BGW9 and C3 Super-LumiNova for legibility. It is powered by a manual-wind ETA 6498 movement, offering a 44-hour power reserve. On balance, the Zelos Skyraider 40 Skeleton is seen as a cool-looking option, though availability is a factor.

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