Side by side

Borealis Watch Co. Porto CovovsCitizen Atomic Perpetual A-T

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

At a glance

12 of 29 specs differ
Diameter
Porto Covo40mm
Atomic Perpetual A-T41mm
Power Reserve
Porto Covo40h
Atomic Perpetual A-T40h
Water Resistance
Porto Covo300m
Atomic Perpetual A-T200m
MSRP
Porto Covo$415
Atomic Perpetual A-T

Full specifications

Case

6 specs
Category
Diver
Pilot
Diameter
40mm
41mm
Thickness
11.6mm
12mm
Lug-to-Lug
42.5mm
46mm
Lug Width
20mm
20mm
Water Resistance
300m
200m

Crystal & Dial

3 specs
AR Coating
Inner
Underside
Dial Color
Black
Blue
Lume
BGW9
None

Movement

2 specs
Caliber
Miyota 9039
H800
Type
Automatic
Solar

Pricing

1 specs
MSRP
$415

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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.

Citizen Atomic Perpetual A-T

Owners widely praise the Citizen Atomic Perpetual A-T for its handsome appearance, solid fit and finish, comfortable bracelet, and intuitive world time function. Its perpetual calendar and atomic timekeeping are highlighted as major conveniences, maintaining accuracy within 0.5 seconds even without syncing, and owners appreciate its "set & forget" nature and solar charging. The watch features a modest, stylish blue dial with delicate design details and a clutter-free layout, along with high water resistance without a screw-down crown and light titanium construction. Some find the dial unnecessarily busy, and its time zone functionality is noted as less useful outside the US, with atomic sync being less compelling below the equator. Accuracy is reported as +/-15 seconds per month if not syncing, but +/-0 seconds if it syncs via radio signal. Some find the watch a bit on the large side.

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