Side by side
Borealis Watch Co. Porto CovovsOblvlo JM Tourbillon
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
12 of 29 specs differDiameter
Porto Covo40mm
JM Tourbillon42mm
Power Reserve
Porto Covo40h
JM Tourbillon65h
Water Resistance
Porto Covo300m
JM Tourbillon50m
MSRP
Porto Covo$415
JM Tourbillon$516
Full specifications
Case
6 specsCategory
Diver
Skeleton
Diameter
40mm
42mm
Thickness
11.6mm
12mm
Lug-to-Lug
42.5mm
46mm
Lug Width
20mm
20mm
Water Resistance
300m
50m
Crystal & Dial
1 specsLume
BGW9
Super-LumiNova
Movement
4 specsCaliber
Miyota 9039
OBL.8024
Power Reserve
40h
65h
Jewels
25
20
Complications
None
Tourbillon
Pricing
1 specsMSRP
$415
$516
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