Serial numbers

Checking a watch with two serial markings

Two markings can reflect a case and a movement, but they can also signal a replacement part.

The first check

Is this a case serial, movement number or model reference? Write down the answer and keep the evidence with the watch's serial. If you cannot get a clear answer, pause before paying or transferring the watch.

What to do next

Document both locations and seek brand-specific advice.

Keep the original photographs, documents and messages together. A record tied to the exact watch helps you resolve a later question about its history; a vague model description does not.

How to use a database result

Enter the serial exactly as it appears on the watch. If the search finds a reported loss, pause the transaction and follow the instructions attached to the record. If it finds no match, keep doing the other checks relevant to this decision. A clear search cannot rule out an unreported theft, establish ownership or authenticate the watch.

Questions to resolve

Is this a case serial, movement number or model reference?
Can you read every character without guessing?
Which document repeats the same identifier?
Who can inspect a hidden or altered engraving?

Continue with the right tool

Use the page below when you have the information needed for the next step.