Side by side
Borealis Watch Co. Estoril 300 GMTvsHemel Sky Racer Mechanical
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
12 of 29 specs differDiameter
Estoril 300 GMT41.50mm
Sky Racer Mechanical43mm
Power Reserve
Estoril 300 GMT40h
Sky Racer Mechanical40h
Water Resistance
Estoril 300 GMT300m
Sky Racer Mechanical50m
MSRP
Estoril 300 GMT$600
Sky Racer Mechanical$550
Full specifications
Case
7 specsCategory
Diver
Chronograph
Diameter
41.50mm
43mm
Thickness
13.5mm
14mm
Lug-to-Lug
47mm
49mm
Lug Width
20mm
20mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
50m
Crystal & Dial
2 specsCrystal
Sapphire
Domed Sapphire
Lume
BGW9
None
Movement
2 specsCaliber
Miyota 9075
Seagull ST19
Type
Automatic
Manual
Pricing
1 specsMSRP
$600
$550
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