Side by side
Borealis Watch Co. JamantavsTudor Black Bay One 31 S&G
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
12 of 29 specs differDiameter
Jamanta42.50mm
Black Bay One 31 S&G31mm
Power Reserve
Jamanta40h
Black Bay One 31 S&G50h
Water Resistance
Jamanta300m
Black Bay One 31 S&G100m
MSRP
Jamanta$415
Black Bay One 31 S&G$6,850
Full specifications
Case
8 specsCategory
Diver
—
Diameter
42.50mm
31mm
Thickness
13.30mm
9.5mm
Lug-to-Lug
50.40mm
46mm
Lug Width
22mm
17mm
Finish
Brushed and polished
Polished + Satin
Water Resistance
300m
100m
Caseback
Solid
Solid screw-down
Crystal & Dial
1 specsLume
BGW9
None
Movement
2 specsCaliber
Miyota 9015
MT5201
Power Reserve
40h
50h
Pricing
1 specsMSRP
$415
$6,850
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