Owners sometimes expect a police report to appear in every online serial search. That is not a safe assumption. Databases differ in their sources, update processes, geographic reach, and rules for what becomes searchable.
A report and a searchable record are different things
Police create and manage incident records under their own procedures. A private or public search service may rely on information supplied by particular organizations or users. The two systems may not exchange every report.
Timing and identifier quality matter
A record may take time to be processed, or a serial may have been recorded incorrectly. Ask the authority handling the case whether the item details need correction and ask the database provider how its listing process works.
Follow the official case anyway
Keep the police reference, proof of ownership, and any confirmation that the watch was reported. A no-match from a separate service does not withdraw the report or establish that the watch is safe.
When buying, use database searches as one screen alongside serial verification, seller identity, provenance, and a return agreement.
Understand Search Coverage
Review what records a service checks and when the result was produced.