Glossary
A unique number identifying an individual watch, distinct from the reference number, which identifies only the model.
A serial number can be checked against known production date ranges and, in a registry like Watch Safe's, against a record for that specific watch. A serial that falls within a plausible range only proves such a number was issued, though, not that this particular watch is the one it was issued to, so matching the serial to the case, movement, and documents still matters.
Browse the full glossary, or look up a serial number in the registry.