Side by side

Tudor Black Bay One 31vsVario 1918 Trench Brass

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
1918 Trench Brass
Vario1918 Trench Brass
MSRP $388

At a glance

13 of 29 specs differ
Diameter
Black Bay One 3131mm
1918 Trench Brass40mm
Power Reserve
Black Bay One 3150h
1918 Trench Brass40h
Water Resistance
Black Bay One 31100m
1918 Trench Brass100m
MSRP
Black Bay One 31$4,600
1918 Trench Brass$388

Full specifications

Case

8 specs
Category
Diver
Field
Diameter
31mm
40mm
Thickness
9.5mm
10mm
Lug-to-Lug
46mm
45mm
Lug Width
17mm
18mm
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
White

Movement

2 specs
Caliber
MT5201
Miyota 82s5
Power Reserve
50h
40h

Pricing

1 specs
MSRP
$4,600
$388

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Tudor Black Bay One 31

Owners widely report the Tudor Black Bay One 31's polished case and bracelet scratch easily, though its wearability under gloves and robust movement are praised. Some desire more micro-adjustment options on the clasp, and a lack of contrast between the silver dial and hands is noted. The 31mm size may be a consideration for daily wear due to its 50-hour power reserve. On balance, owners and reviewers appreciate the Tudor Black Bay One 31 for its comfortable wearability and robust movement, despite concerns about case scratching and clasp adjustability.

Vario 1918 Trench Brass

Owners widely praise the Vario 1918 Trench Brass for its attractive, precisely made dial and case, with the evolving brass patina noted as a positive feature. The bund strap is considered comfortable and well-fitting by some, though others find it stiff and short for larger wrists. The lume is considered poor. The Miyota 82s5 movement is described as adequate, with accuracy ranging from about -10 seconds per day to simply running slow. On balance, owners rate the Vario 1918 Trench Brass highly for its fantastic looks and the unique character of its brass case.

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