Side by side

Borealis Watch Co. Porto CovovsMarathon TSAR (Tritium Search & Rescue) Diver's Quartz

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
TSAR (Tritium Search & Rescue) Diver's Quartz
MarathonTSAR (Tritium Search & Rescue) Diver's Quartz
MSRP $1,550

At a glance

9 of 29 specs differ
Diameter
Porto Covo40mm
TSAR (Tritium Search & Rescue) Diver's Quartz46mm
Power Reserve
Porto Covo40h
TSAR (Tritium Search & Rescue) Diver's Quartz40h
Water Resistance
Porto Covo300m
TSAR (Tritium Search & Rescue) Diver's Quartz300m
MSRP
Porto Covo$415
TSAR (Tritium Search & Rescue) Diver's Quartz$1,550

Full specifications

Case

5 specs
Diameter
40mm
46mm
Thickness
11.6mm
14mm
Lug-to-Lug
42.5mm
48mm
Lug Width
20mm
20mm
Material
Stainless Steel
316L Stainless Steel

Crystal & Dial

1 specs
Lume
BGW9
None

Movement

2 specs
Caliber
Miyota 9039
Swiss High-Torque Quartz
Type
Automatic
Quartz

Pricing

1 specs
MSRP
$415
$1,550

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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.

Marathon TSAR (Tritium Search & Rescue) Diver's Quartz

Owners widely praise the Marathon TSAR (Tritium Search & Rescue) Diver's Quartz for its ISO 6425 certification and practical, everyday wearability, with one owner noting the movement sets and ticks fine with expected quartz accuracy. The bezel and crystal are also described as great. One owner reports the 41mm TSAR wears small and has a field watch aesthetic, while another notes the TSAR Medium, listed at 12mm thick, visually appears thicker. Overall, owners rate the Marathon TSAR (Tritium Search & Rescue) Diver's Quartz highly for its robust build and practical design.

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