Side by side

Borealis Watch Co. Porto CovovsTornek-Rayville CISO M38 Field

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
CISO M38 Field
Tornek-RayvilleCISO M38 Field
MSRP $695

At a glance

11 of 29 specs differ
Diameter
Porto Covo40mm
CISO M38 Field38mm
Power Reserve
Porto Covo40h
CISO M38 Field42h
Water Resistance
Porto Covo300m
CISO M38 Field100m
MSRP
Porto Covo$415
CISO M38 Field$695

Full specifications

Case

6 specs
Category
Diver
Diameter
40mm
38mm
Thickness
11.6mm
12.45mm
Lug-to-Lug
42.5mm
43.6mm
Lug Width
20mm
20mm
Water Resistance
300m
100m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Lume
BGW9
Superluminova

Movement

2 specs
Caliber
Miyota 9039
TMI NH36
Power Reserve
40h
42h

Pricing

1 specs
MSRP
$415
$695

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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.

Tornek-Rayville CISO M38 Field

Owners widely report the Tornek-Rayville CISO M38 Field offers high overall quality with a comfortable bracelet featuring single-sided screw links. The watch exhibits minimal wear, with only hairline scratches and a faint, difficult-to-photograph bezel mark. On balance, owners value the Tornek-Rayville CISO M38 Field for its robust build and comfortable wearability.

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