Side by side

Borealis Watch Co. Porto CovovsYema Navygraf Phantom CMM.10 Limited Edition

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
Navygraf Phantom CMM.10 Limited Edition
YemaNavygraf Phantom CMM.10 Limited Edition
MSRP $2,090

At a glance

11 of 29 specs differ
Diameter
Porto Covo40mm
Navygraf Phantom CMM.10 Limited Edition38.5mm
Power Reserve
Porto Covo40h
Navygraf Phantom CMM.10 Limited Edition40h
Water Resistance
Porto Covo300m
Navygraf Phantom CMM.10 Limited Edition100m
MSRP
Porto Covo$415
Navygraf Phantom CMM.10 Limited Edition$2,090

Full specifications

Case

6 specs
Diameter
40mm
38.5mm
Thickness
11.6mm
11.05mm
Lug-to-Lug
42.5mm
46mm
Lug Width
20mm
19mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
100m

Crystal & Dial

3 specs
Crystal
Sapphire
Domed Sapphire
Dial Color
Black
Phantom
Lume
BGW9
None

Movement

1 specs
Caliber
Miyota 9039
Yema CMM.10

Pricing

1 specs
MSRP
$415
$2,090

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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.

Yema Navygraf Phantom CMM.10 Limited Edition

Owners widely praise the Yema Navygraf Phantom CMM.10 Limited Edition for its vibrant blue dial and well-finished 39mm stainless steel case. The watch delivers an impressive 70-hour power reserve and accurate timekeeping, with one owner reporting -3 seconds over two weeks. The H-link bracelet's clasp is criticized by reviewers for being difficult to open and rattly, with the Marine Nationale strap being the preferred alternative. Overall, owners and reviewers rate the Yema Navygraf Phantom CMM.10 Limited Edition highly for its striking dial color and robust specifications at its price point.

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