Side by side

Borealis Watch Co. Porto CovovsTudor Black Bay 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
Black Bay GMT
TudorBlack Bay GMT
MSRP $5,275

At a glance

20 of 29 specs differ
Diameter
Porto Covo40mm
Black Bay GMT41mm
Power Reserve
Porto Covo40h
Black Bay GMT70h
Water Resistance
Porto Covo300m
Black Bay GMT200m
MSRP
Porto Covo$415
Black Bay GMT$5,275

Full specifications

Case

8 specs
Category
Diver
GMT
Diameter
40mm
41mm
Thickness
11.6mm
14.6mm
Lug-to-Lug
42.5mm
46mm
Lug Width
20mm
22mm
Finish
Brushed and polished
Polished + Satin
Water Resistance
300m
200m
Caseback
Solid
Solid screw-down

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Inner
Indices
Applied
Lume
BGW9
None

Movement

7 specs
Caliber
Miyota 9039
MT5652
Beat Rate
28,800 vph
0 vph
Power Reserve
40h
70h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
GMT

Pricing

1 specs
MSRP
$415
$5,275

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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.

Tudor Black Bay GMT

The Tudor Black Bay GMT is widely praised for its in-house movement offering local jumping GMT functionality, its impressive case finishing, and its vintage-inspired, drop-dead good looks. Reviewers highlight its strong value and consider it a quintessential sport watch for travelers. Some enthusiasts find its 15mm thickness divisive, though beveled edges visually reduce its perceived size. Overall, reviewers rate the Tudor Black Bay GMT highly for its excellent design and travel functionality at its price point.

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