Side by side

Borealis Watch Co. Porto CovovsSinn EZM 3F

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
EZM 3F
SinnEZM 3F
MSRP $1,933

At a glance

17 of 29 specs differ
Diameter
Porto Covo40mm
EZM 3F41mm
Power Reserve
Porto Covo40h
EZM 3F38h
Water Resistance
Porto Covo300m
EZM 3F200m
MSRP
Porto Covo$415
EZM 3F$1,933

Full specifications

Case

8 specs
Category
Diver
Tool
Diameter
40mm
41mm
Thickness
11.6mm
11.7mm
Lug-to-Lug
42.5mm
Lug Width
20mm
20mm
Finish
Brushed and polished
bead-blasted
Water Resistance
300m
200m
Caseback
Solid

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Inner
Underside
Indices
Applied
Lume
BGW9
Luminescent

Movement

4 specs
Caliber
Miyota 9039
SW200-1
Power Reserve
40h
38h
Jewels
25
26
Complications
None
Date, Pilot's Bezel

Pricing

1 specs
MSRP
$415
$1,933

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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.

Sinn EZM 3F

Owners widely praise the Sinn EZM 3F for its excellent legibility, robust bead-blasted build, and practical left-hand crown, with some noting its compact, slim wearability and smart appearance on a bracelet. One owner flags minor finishing imperfections and an awkward date window placement, and expresses a desire for tegimented scratch resistance. Overall, owners rate the Sinn EZM 3F highly for its practical mission timer design and compact wearability.

From video reviewers

The Sinn EZM 3F's Ar-Dehumidifying Technology for fogging prevention and temperature resistance is a key strength. Reviewers noted the bracelet lacked on-the-fly micro-adjustment and diver's extensions.

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