Side by side

Borealis Watch Co. Porto CovovsSeiko Ice Diver

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
Ice Diver
SeikoIce Diver
MSRP $900

At a glance

10 of 29 specs differ
Diameter
Porto Covo40mm
Ice Diver45mm
Power Reserve
Porto Covo40h
Ice Diver70h
Water Resistance
Porto Covo300m
Ice Diver200m
MSRP
Porto Covo$415
Ice Diver$900

Full specifications

Case

5 specs
Diameter
40mm
45mm
Thickness
11.6mm
12.9mm
Lug-to-Lug
42.5mm
52.6mm
Lug Width
20mm
20mm
Water Resistance
300m
200m

Crystal & Dial

1 specs
Lume
BGW9
LumiBrite

Movement

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

Pricing

1 specs
MSRP
$415
$900

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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 Ice Diver

Owners widely praise the Seiko Prospex Sea for its robust build, classic dive watch design, and excellent value, with many highlighting its strong lume and comfortable wearability. Reviewers consistently flag its superior bezel action and overall finishing as standout features for its price point. Some owners find the 43mm case size substantial, with one noting it felt big, thick, and heavy on a 6.5-inch wrist, though others consider it a perfect size. The movement's power reserve is noted as less than newer variants by one reviewer. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its classic design and robust build at an accessible price.

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