Side by side
Borealis Watch Co. JamantavsTudor Black Bay Pro
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
20 of 29 specs differDiameter
Jamanta42.50mm
Black Bay Pro39mm
Power Reserve
Jamanta40h
Black Bay Pro70h
Water Resistance
Jamanta300m
Black Bay Pro200m
MSRP
Jamanta$415
Black Bay Pro$5,075
Full specifications
Case
8 specsCategory
Diver
GMT
Diameter
42.50mm
39mm
Thickness
13.30mm
14.6mm
Lug-to-Lug
50.40mm
46mm
Lug Width
22mm
20mm
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
Miyota 9015
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
$415
$5,075
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