Side by side

Tudor Black Bay One 31vsWilliam Wood International Association of Fire

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Black Bay One 31
TudorBlack Bay One 31
MSRP $4,600
International Association of Fire
William WoodInternational Association of Fire
MSRP $820

At a glance

12 of 29 specs differ
Diameter
Black Bay One 3131mm
International Association of Fire41mm
Power Reserve
Black Bay One 3150h
International Association of Fire40h
Water Resistance
Black Bay One 31100m
International Association of Fire100m
MSRP
Black Bay One 31$4,600
International Association of Fire$820

Full specifications

Case

7 specs
Diameter
31mm
41mm
Thickness
9.5mm
15mm
Lug-to-Lug
46mm
49mm
Lug Width
17mm
20mm
Material
Stainless Steel
316L Stainless Steel
Finish
Polished + Satin
Brushed and polished
Caseback
Solid screw-down
Solid

Crystal & Dial

2 specs
Crystal
Sapphire
Domed Sapphire
Dial Color
Anthracite
Standard

Movement

2 specs
Caliber
MT5201
Seiko NH35
Power Reserve
50h
40h

Pricing

1 specs
MSRP
$4,600
$820

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