Side by side

Borealis Watch Co. Porto CovovsGlycine Airman Worldtimer GMT Dual Time

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

20 of 29 specs differ
Diameter
Porto Covo40mm
Airman Worldtimer GMT Dual Time40mm
Power Reserve
Porto Covo40h
Airman Worldtimer GMT Dual Time
Water Resistance
Porto Covo300m
Airman Worldtimer GMT Dual Time100m
MSRP
Porto Covo$415
Airman Worldtimer GMT Dual Time$995

Full specifications

Case

8 specs
Category
Diver
GMT
Diameter
40mm
40mm
Thickness
11.6mm
12mm
Lug-to-Lug
42.5mm
Lug Width
20mm
20mm
Finish
Brushed and polished
Water Resistance
300m
100m
Caseback
Solid

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Inner
Dial Color
Black
Ivory
Indices
Applied
Lume
BGW9
None

Movement

6 specs
Caliber
Miyota 9039
RONDA 515.24H
Type
Automatic
Quartz
Beat Rate
28,800 vph
Power Reserve
40h
Jewels
25
1
Complications
None
GMT, Date, World Time

Pricing

1 specs
MSRP
$415
$995

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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.

Glycine Airman Worldtimer GMT Dual Time

Owners widely praise the Glycine Airman Worldtimer GMT Dual Time for its comfortable 40mm size, attractive aesthetics, blue GMT hand, sapphire crystal with blue AR coating, and locking bezel. Some owners find it a significant improvement over previous Airman models, with one reporting good timekeeping. However, the dual 24-hour and GMT hands are noted by some as making local time setting less intuitive than a purist 24-hour dial. On balance, owners and reviewers appreciate the Glycine Airman Worldtimer GMT Dual Time for its comfortable wearability and classic design elements.

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