Side by side

Borealis Watch Co. Porto CovovsZelos Thresher 41 GMT

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
Thresher 41 GMT
ZelosThresher 41 GMT
MSRP $729

At a glance

12 of 29 specs differ
Diameter
Porto Covo40mm
Thresher 41 GMT41mm
Power Reserve
Porto Covo40h
Thresher 41 GMT40h
Water Resistance
Porto Covo300m
Thresher 41 GMT200m
MSRP
Porto Covo$415
Thresher 41 GMT$729

Full specifications

Case

7 specs
Category
Diver
GMT
Diameter
40mm
41mm
Thickness
11.6mm
11.5mm
Lug-to-Lug
42.5mm
41mm
Lug Width
20mm
20mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
200m

Crystal & Dial

3 specs
Crystal
Sapphire
Domed Sapphire
Dial Color
Black
Damascus LE
Lume
BGW9
None

Movement

1 specs
Caliber
Miyota 9039
Miyota 9075 GMT

Pricing

1 specs
MSRP
$415
$729

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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 Thresher 41 GMT

Owners widely praise the Zelos Thresher 41 GMT for its creative design, titanium construction, and excellent lume. Some find the worldtimer bezel busy and the GMT function less easy to read, while others note the double Mother of Pearl dial's dynamic color shifts can be reflective in direct sun. The bezel-based world timer requires manual adjustment and allows for independent GMT use. Overall, owners rate the Zelos Thresher 41 GMT highly for its unique titanium build and striking dial at its price point.

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