Side by side

Borealis Watch Co. Porto CovovsChristopher Ward C63 Sealander Extreme 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
C63 Sealander Extreme GMT
Christopher WardC63 Sealander Extreme GMT
MSRP $2,075

At a glance

12 of 29 specs differ
Diameter
Porto Covo40mm
C63 Sealander Extreme GMT40mm
Power Reserve
Porto Covo40h
C63 Sealander Extreme GMT56h
Water Resistance
Porto Covo300m
C63 Sealander Extreme GMT150m
MSRP
Porto Covo$415
C63 Sealander Extreme GMT$2,075

Full specifications

Case

6 specs
Category
Diver
GMT
Diameter
40mm
40mm
Thickness
11.6mm
12.05mm
Lug-to-Lug
42.5mm
48mm
Lug Width
20mm
22mm
Water Resistance
300m
150m

Crystal & Dial

1 specs
Lume
BGW9
SLN X1 BL / GL

Movement

4 specs
Caliber
Miyota 9039
SW330-2
Beat Rate
28,800 vph
4 vph
Power Reserve
40h
56h
Complications
None
GMT

Pricing

1 specs
MSRP
$415
$2,075

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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.

Christopher Ward C63 Sealander Extreme GMT

The Christopher Ward C63 Sealander Extreme GMT is widely praised as a competent and comfortable tool watch offering excellent value. Reviewers consistently highlight its impressive Globolight lume, providing excellent legibility, and its well-proportioned 41mm brushed steel case. The Sellita SW330-2 movement is noted as reliable, though its standard accuracy is stated as ±20 seconds per day, and its GMT functionality is considered less advanced than some alternatives. One owner notes the green dial can be an acquired taste, and hands and markers are considered less refined than those on significantly more expensive watches. The Christopher Ward C63 Sealander Extreme GMT is priced attractively at €1,895 on bracelet. Overall, owners and reviewers highly regard the Christopher Ward C63 Sealander Extreme GMT for its rugged, travel-ready design and impressive lume at its price point.

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