Side by side
Borealis Watch Co. Caloura 300mvsSerket 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
Caloura 300m42mm
Reef Mariana40mm
Power Reserve
Caloura 300m40h
Reef Mariana—
Water Resistance
Caloura 300m300m
Reef Mariana200m
MSRP
Caloura 300m$275
Reef Mariana$449
Full specifications
Case
6 specsCategory
Diver
—
Diameter
42mm
40mm
Thickness
13.9mm
13.2mm
Lug-to-Lug
44.20mm
47.5mm
Lug Width
22mm
20mm
Water Resistance
300m
200m
Crystal & Dial
1 specsDial Color
Black
Orange
Movement
2 specsCaliber
NH35
Seiko NH35
Power Reserve
40h
—
Pricing
1 specsMSRP
$275
$449
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