Side by side

Borealis Watch Co. Porto CovovsBaltic Prismic Stone

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
Prismic Stone
BalticPrismic Stone
MSRP $1,404

At a glance

13 of 29 specs differ
Diameter
Porto Covo40mm
Prismic Stone36mm
Power Reserve
Porto Covo40h
Prismic Stone50h
Water Resistance
Porto Covo300m
Prismic Stone30m
MSRP
Porto Covo$415
Prismic Stone$1,404

Full specifications

Case

6 specs
Category
Diver
Dress
Diameter
40mm
36mm
Thickness
11.6mm
9.2mm
Lug-to-Lug
42.5mm
44mm
Lug Width
20mm
20mm
Water Resistance
300m
30m

Crystal & Dial

3 specs
AR Coating
Inner
Yes
Dial Color
Black
Bloodstone
Lume
BGW9
None

Movement

3 specs
Caliber
Miyota 9039
La Joux-Perret D100
Type
Automatic
Manual
Power Reserve
40h
50h

Pricing

1 specs
MSRP
$415
$1,404

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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.

Baltic Prismic Stone

Owners and reviewers widely praise the Baltic Prismic Stone for its striking and unique natural stone dials, with specific mentions of the bloodstone and red agate variants being highlights. The watch is noted for its refined, retro dress watch aesthetic, featuring a well-finished 36mm bi-metal case combining stainless steel and titanium, and a slim profile measuring 9.2mm or 9.5mm thick. The hand-wound movement, either an ETA Peseux 7001 or a La Joux-Perret D100, is generally seen as reliable, offering a 42-hour or 50-hour power reserve respectively. However, some owners find the collection overpriced and the small, recessed crown uncomfortable for winding. The Milanese bracelet is also a point of contention, with some finding it may not articulate well for smaller wrists. Accuracy figures vary, with one owner reporting +1/+2 seconds per day and another around -6 seconds per day.

From video reviewers

The unique natural stone dials are a standout feature of the Baltic Prismic Stone. The slim 9mm case, constructed from stainless steel and Grade 5 titanium, is also a notable aspect. However, some buyers may find the price of €1,300 to be a trade-off, considering the watch's Swiss movement and slim profile may not justify the cost compared to competitors.

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