Side by side
Borealis Watch Co. Caloura 300mvsTudor Black Bay GMT
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
20 of 29 specs differDiameter
Caloura 300m42mm
Black Bay GMT41mm
Power Reserve
Caloura 300m40h
Black Bay GMT70h
Water Resistance
Caloura 300m300m
Black Bay GMT200m
MSRP
Caloura 300m$275
Black Bay GMT$5,275
Full specifications
Case
8 specsCategory
Diver
GMT
Diameter
42mm
41mm
Thickness
13.9mm
14.6mm
Lug-to-Lug
44.20mm
46mm
Lug Width
22mm
22mm
Finish
Brushed and polished
Polished + Satin
Water Resistance
300m
200m
Caseback
Solid
Solid screw-down
Crystal & Dial
4 specsCrystal Shape
Flat
—
AR Coating
Inner
—
Indices
Applied
—
Lume
BGW9
None
Movement
7 specsCaliber
NH35
MT5652
Beat Rate
28,800 vph
0 vph
Power Reserve
40h
70h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
GMT
Pricing
1 specsMSRP
$275
$5,275
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