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Home/Browse/Tudor/Black Bay One 31
Tudor Black Bay One 31 — Anthracite
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Tudor Black Bay One 31

Ref. m79600-0001
Diver

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.

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Retail MSRP
$4,600
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Alternatives
Case
31mm
Power Reserve
50h
Movement
Automatic
Water Resistance
100m
Crystal
Sapphire
01

Case Dimensions

Diameter31mm
Thickness9.5mm
Lug-to-Lug—
Lug Width17mm
02

Case Build

MaterialStainless Steel
FinishPolished + Satin
Water Resistance100m
CasebackSolid screw-down
03

Crystal & Dial

CrystalSapphire
Dial ColorAnthracite
04

Movement

Caliber
MT5201
TypeAutomatic
Beat Rate—
Power Reserve50 hours
Jewels—
HackingNo
Hand-WindingNo
ComplicationsTime only
05

Design Language

Dial styleMatte
BezelRotating (dive)
Bracelet / strapLug-attached bracelet
HandsMercedes
AI-detected from product image · 5/22/2026
In a nutshell

The Tudor Black Bay One 31 (ref. m79600-0001) is an automatic diver watch, with a 31mm stainless steel case, 9.5mm thick, powered by the MT5201 movement and a 50-hour power reserve. Water resistance is rated to 100m, under a sapphire crystal. Manufacturer MSRP is $4,600. The dial color is anthracite.

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