Side by side

Borealis Watch Co. Porto CovovsSeiko Prospex Sea

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
Prospex Sea
SeikoProspex Sea
MSRP $1,500

At a glance

12 of 29 specs differ
Diameter
Porto Covo40mm
Prospex Sea43.5mm
Power Reserve
Porto Covo40h
Prospex Sea70h
Water Resistance
Porto Covo300m
Prospex Sea200m
MSRP
Porto Covo$415
Prospex Sea$1,500

Full specifications

Case

6 specs
Diameter
40mm
43.5mm
Thickness
11.6mm
13.3mm
Lug-to-Lug
42.5mm
51mm
Lug Width
20mm
22mm
Material
Stainless Steel
Titanium
Water Resistance
300m
200m

Crystal & Dial

2 specs
AR Coating
Inner
Anti-reflective coating on inner surface
Lume
BGW9
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
Miyota 9039
6R35
Power Reserve
40h
70h
Jewels
25
24

Pricing

1 specs
MSRP
$415
$1,500

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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.

Seiko Prospex Sea

Seiko Prospex Sea owners and reviewers praise its Marinemaster-style aesthetic, excellent case finishing, and impressive LumiBrite lume. The watch is powered by the 6R15 movement with a 50-hour power reserve and comes with both a steel bracelet and a silicone strap. Some owners find the Seiko Prospex Sea to be a great value and a suitable first "proper" watch, while others report it is uncomfortably big, thick, and heavy on smaller wrists. Reviewers note the GMT function is secondary with a less prominent scale, and the bezel's quieter clicks may not appeal to all. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its classic design and finishing at its price point.

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