Side by side
Borealis Watch Co. Estoril 300 GMTvsSerket Watch Co Reef Mariana
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
10 of 29 specs differDiameter
Estoril 300 GMT41.50mm
Reef Mariana40mm
Power Reserve
Estoril 300 GMT40h
Reef Mariana—
Water Resistance
Estoril 300 GMT300m
Reef Mariana200m
MSRP
Estoril 300 GMT$600
Reef Mariana$449
Full specifications
Case
6 specsCategory
Diver
—
Diameter
41.50mm
40mm
Thickness
13.5mm
13.2mm
Lug-to-Lug
47mm
47.5mm
Lug Width
20mm
20mm
Water Resistance
300m
200m
Crystal & Dial
1 specsDial Color
Black
Orange
Movement
2 specsCaliber
Miyota 9075
Seiko NH35
Power Reserve
40h
—
Pricing
1 specsMSRP
$600
$449
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