Side by side

Tudor Black Bay One 31vsYema Wristmaster Slim Small Seconds CMM.29

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
Wristmaster Slim Small Seconds CMM.29
YemaWristmaster Slim Small Seconds CMM.29
MSRP $2,249

At a glance

11 of 29 specs differ
Diameter
Black Bay One 3131mm
Wristmaster Slim Small Seconds CMM.2939mm
Power Reserve
Black Bay One 3150h
Wristmaster Slim Small Seconds CMM.2940h
Water Resistance
Black Bay One 31100m
Wristmaster Slim Small Seconds CMM.29100m
MSRP
Black Bay One 31$4,600
Wristmaster Slim Small Seconds CMM.29$2,249

Full specifications

Case

7 specs
Category
Diver
Dress
Diameter
31mm
39mm
Thickness
9.5mm
9mm
Lug-to-Lug
46mm
Lug Width
17mm
20mm
Finish
Polished + Satin
Brushed and polished
Caseback
Solid screw-down
Solid

Crystal & Dial

1 specs
Dial Color
Anthracite
Black

Movement

2 specs
Caliber
MT5201
Yema CMM.29
Power Reserve
50h
40h

Pricing

1 specs
MSRP
$4,600
$2,249

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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.

Yema Wristmaster Slim Small Seconds CMM.29

Owners widely praise the Yema Wristmaster Slim Small Seconds CMM.29 for its slim 9.5mm case, unique nature-inspired dial, and brushed steel finish. The micro-rotor movement is noted for its 4Hz beat rate and 42-hour power reserve, regulated to -/+ 10 seconds per day. Some owners report concerns regarding the movement and warranty process, while a reviewer questioned the value proposition at its price point and noted minor finishing inconsistencies on a prototype. On balance, the Yema Wristmaster Slim Small Seconds CMM.29 is highly regarded by owners for its distinctive design and comfortable wearability.

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