Side by side

Borealis Watch Co. Porto CovovsLongines LONGINES SPIRIT ZULU 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
LONGINES SPIRIT ZULU TIME
LonginesLONGINES SPIRIT ZULU TIME
MSRP $5,200

At a glance

10 of 29 specs differ
Diameter
Porto Covo40mm
LONGINES SPIRIT ZULU TIME39mm
Power Reserve
Porto Covo40h
LONGINES SPIRIT ZULU TIME40h
Water Resistance
Porto Covo300m
LONGINES SPIRIT ZULU TIME100m
MSRP
Porto Covo$415
LONGINES SPIRIT ZULU TIME$5,200

Full specifications

Case

6 specs
Category
Diver
GMT
Diameter
40mm
39mm
Thickness
11.6mm
13.5mm
Lug-to-Lug
42.5mm
46.8mm
Lug Width
20mm
21mm
Water Resistance
300m
100m

Crystal & Dial

2 specs
Dial Color
Black
Anthracite
Lume
BGW9
None

Movement

1 specs
Caliber
Miyota 9039
L844.4

Pricing

1 specs
MSRP
$415
$5,200

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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.

LONGINES SPIRIT ZULU TIME

Owners widely praise the Longines Spirit Zulu Time for its superb finishing, smooth crown action, and mesmerizing ceramic bezel, with many noting its premium pilot/sporty design and unique dial details. The movement is consistently lauded for its extreme accuracy, running at 0 to +1 second per day, and the watch is considered to offer remarkable value that punches above its price point. However, the bracelet is criticized by multiple sources for its push-pin adjustment and limited micro-adjustment holes, and the 42mm case size with a 49.3mm lug-to-lug is noted as potentially large for smaller wrists, though some users express a preference for the 39mm size. One owner reported their movement failed within the first year and found setting the date a "nightmare," while another owner notes minor criticisms like the date window being slightly off-center. On balance, owners and reviewers rate the Longines Spirit Zulu Time highly for its impressive finishing and accuracy at its price point.

From video reviewers

The 39mm case size is a significant strength, addressing previous concerns about thickness. The value proposition within the GMT market is also a shared positive point. No consensus on weaknesses was reached.

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