Side by side

Borealis Watch Co. Estoril 300 GMTvsZelos Aventurine (sellita)

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
Aventurine (sellita)
ZelosAventurine (sellita)
MSRP $699

At a glance

13 of 29 specs differ
Diameter
Estoril 300 GMT41.50mm
Aventurine (sellita)39mm
Power Reserve
Estoril 300 GMT40h
Aventurine (sellita)40h
Water Resistance
Estoril 300 GMT300m
Aventurine (sellita)50m
MSRP
Estoril 300 GMT$600
Aventurine (sellita)$699

Full specifications

Case

7 specs
Category
Diver
Dress
Diameter
41.50mm
39mm
Thickness
13.5mm
7.6mm
Lug-to-Lug
47mm
39mm
Lug Width
20mm
20mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
50m

Crystal & Dial

3 specs
Crystal
Sapphire
Domed Sapphire
Dial Color
Black
Aventurine (Sellita)
Lume
BGW9
None

Movement

2 specs
Caliber
Miyota 9075
ETA/Peseux 7001
Type
Automatic
Manual

Pricing

1 specs
MSRP
$600
$699

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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. 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.

Zelos Aventurine (sellita)

Zelos Aventurine (sellita) owners widely praise the dial's star-like appearance and the bracelet's light-catching qualities. Some owners note sharp edges on the bracelet. The manual-wind movement is cited as inconvenient for resetting the date and moon phase. Overall, owners rate the Zelos Aventurine (sellita) highly for its gorgeous aventurine dial.

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