Side by side

Borealis Watch Co. Estoril 300 GMTvsSeiko 5 Sports SKX series

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Estoril 300 GMT
Borealis Watch Co.Estoril 300 GMT
MSRP $600
5 Sports SKX series
Seiko5 Sports SKX series
MSRP $350

At a glance

11 of 29 specs differ
Diameter
Estoril 300 GMT41.50mm
5 Sports SKX series38mm
Power Reserve
Estoril 300 GMT40h
5 Sports SKX series41h
Water Resistance
Estoril 300 GMT300m
5 Sports SKX series100m
MSRP
Estoril 300 GMT$600
5 Sports SKX series$350

Full specifications

Case

5 specs
Diameter
41.50mm
38mm
Thickness
13.5mm
12.1mm
Lug-to-Lug
47mm
44.2mm
Lug Width
20mm
20mm
Water Resistance
300m
100m

Crystal & Dial

2 specs
Crystal
Sapphire
Hardlex
Lume
BGW9
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
Miyota 9075
4R36
Power Reserve
40h
41h
Jewels
25
24

Pricing

1 specs
MSRP
$600
$350

Follow this matchup

Get a note when Borealis Watch Co. Estoril 300 GMT vs Seiko 5 Sports SKX series gets more votes, a community discussion, or a price drop. No account needed.

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. Estoril 300 GMT

Owners widely praise the Borealis Watch Co. Estoril 300 GMT for its excellent value, robust build quality, and crisp dial, with reviewers highlighting its exceptionally bright BGW9 lume and dive-ready ceramic bezel. Some owners appreciate the brushed and polished finishes, though one owner noted a desire for a white-painted second hand. The included NATO strap is considered too thick with a loose weave, and the sapphire bezel insert is seen by some as a minor aesthetic departure from its inspirations. Overall, owners rate the Borealis Watch Co. Estoril 300 GMT highly for its impressive build quality and value.

Seiko 5 Sports SKX series

The Seiko 5 Sports SKX series is widely praised for its value, robust build, and powerful lume, with owners appreciating its comfortable bracelets and improved movement featuring hacking and hand-winding. Some owners find the original SKX models heavy and bulky, while others praise their ruggedness and iconic dive watch design. Reviewers note the 38mm models offer great value at around €350 and are exemplary gateway watches, though their 100m water resistance without a screw-down crown makes them unsuitable for diving. The Seiko 5 Sports SKX series is seen as a decent watch, especially under £200, but lacks the tool watch capabilities of the original SKX, missing a screw-down crown, bezel pip, and ISO rating. On balance, owners and reviewers rate the Seiko 5 Sports SKX series well for its blend of value, improved movement, and tool-watch aesthetic, despite some missing dive certifications.

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.