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Before You Diagnose Anything: Which Tudor Movement Do You Actually Have?
A Black Bay from 2014 and one from 2024 share almost nothing mechanically. Identify your calibre before you diagnose anything.
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Timekeeper PH
The Movement Clinic — Tudor movement problems, diagnosed
Most bad Tudor advice comes from applying a fact about one movement to a watch that has a different one inside it. Start by finding out what you actually own, then work out whether your watch has a problem at all.
Tools
Work out what you're dealing with
Something's wrong
Pick your symptom and your Tudor, and see what the research actually says it might be.
Start the symptom checker →Know your movement
Enter your reference or model name and get the exact calibre, spec and which articles apply.
Look up your calibre →Test your accuracy
Log a 14-day rate test and get the verdict most owners read backwards.
Start logging →Run a self-test
Seven step-by-step protocols — rate, power reserve, magnetism and more — that work on any mechanical watch.
Browse the self-tests →
Start here
Nothing else works until you read this
The series
Filter by your era
01
The Spinning Rotor: Why Your Tudor Won't Hold a Charge
A rotor that spins freely without winding anything. The ten-second test that identifies it, and what it costs to fix.
Read →02
The Hands Stopped But the Seconds Hand Kept Going
The hour and minute hands freeze while the seconds hand runs on. What has failed, and why it is not what most owners assume.
Read →03
The Black Bay GMT Date Wheel Problem Tudor Never Announced
The one genuinely confirmed modern Tudor defect. Affects BB GMT 79830RB from 2018 to 2021 — here is how to test yours.
Read →04
“My Tudor Is Running Fast” — What's Actually Wrong (Usually Nothing)
The most common Tudor complaint on the internet, and most of the time the watch is fine. How to measure properly and read the result.
Read →05
The 70-Hour Power Reserve That Isn't
Not every Manufacture calibre is 70 hours, and the -U suffix does not tell you which. Measure yours against the right number.
Read →06
Rotor Noise: Normal, or Stop Wearing It Today?
Every automatic makes rotor noise. Telling the harmless kind from the kind that means metal is touching metal.
Read →07
The Date-Setting Danger Zone: One Habit That Breaks Tudors
Setting the date in the wrong hours puts the date change mechanism under load. The habit is free to fix and expensive to ignore.
Read →08
The Chronograph That Won't Reset to Zero
A chronograph hand that stops short of zero, and what it means on an integrated movement versus a module.
Read →09
The Heritage Chrono's Hidden Cost: What a Dubois Dépraz Module Means for You
The Heritage Chrono 70330 is not a 7753. It is a 2892-A2 with a module on top, and that changes the whole service story.
Read →10
The Tudor 390: The Vintage Movement Watchmakers Turn Away
Not an in-house movement, and its automatic module is the single most problematic thing in vintage Tudor. What owners need to know.
Read →11
Snowflake Dial Rot — and the Service That Can Halve Your Watch's Value
For a vintage Tudor the dial determines the value, and the service decision is irreversible. Read this before you send it anywhere.
Read →12
Water Inside the Case: The 48-Hour Emergency
Corrosion starts within hours. What to do in the first 48 hours, in order, and what not to do at any point.
Read →13
The Crown You're About to Strip
Counter-clockwise first. The shortest post in this series, and it prevents the most common owner-inflicted damage there is.
Read →No articles in this era.
Red lines
Stop wearing it now
Everything else in this series can wait for a measured diagnosis. These cannot — each one gets worse with every hour the watch keeps running.
| Symptom | Why it is urgent |
|---|---|
| Water or condensation inside the case | Corrosion starts within hours. Pull the crown out to stop and vent it. |
| Grinding or crunching while winding | Metal on metal. Every turn creates more damage and more debris. |
| Metallic scraping or a loose-object rattle | A loose rotor, screw or detached part is circulating inside a lubricated mechanism. |
| Crown will not screw down, or spins freely | Zero water resistance now, and forcing it destroys more thread with each attempt. |
| Hands stopping and restarting, or the seconds hand stuttering or jumping backwards | An escapement, train or hairspring fault — or debris. |
| Hands touching each other, or a hand visibly loose | It will jam the movement, and a loose hand can wreck the dial. |
| Chronograph will not reset, or a pusher stays depressed | The coupling is under load. Continuing can bend the hammer or heart piece. |
| Stops in one position but runs in another | Marginal amplitude or a physical obstruction. |
| Power reserve collapse — 70 hours down to 20 | Mainspring, barrel, or major friction. |
| Visible rust or spotting on the dial, hands, or through the caseback | Active corrosion. |
| Chipped or cracked crystal | Water resistance is gone, and cracks propagate. |
| The dive bezel now rotates clockwise | The click spring has failed. This is a dive safety defect and a valid warranty claim. |
| Immediately after a hard drop | Check for a broken balance staff, displaced hairspring or cracked jewel. Cheap to check, expensive to ignore. |
| A fast rate that returns after two proper demagnetising cycles | It was never magnetism. Something is mechanically wrong. |
The Movement Clinic is an independent publication by Timekeeper PH. It is not affiliated with, endorsed by, or connected to Tudor or the Rolex Group. Every article lists its sources.