Know the manufacturer?
Open its guide and browse accepted model identities. Check the complete documented configuration before deciding on a match.
Browse manufacturers →Identification help
Start with what you can read.
Record a name on the dial and any movement markings you already have. Keep movement and case markings separate.
Have a model name?
Search it directly. A model may appear in several sources with different dials, cases, movements or bands.
Have a serial number?
Keep it with its location and other markings. A serial number on a movement and one on a case are separate evidence.
Checking an auction description?
Compare the photographs with original catalog evidence. Historical prices are distinct from today's market values.