An object number begins with a four-digit year, while the description calls the object much older. There need not be a contradiction: the number may belong to the institution’s registration system.
Read the field rather than decoding by appearance
Look for explicit labels such as date made, acquired or accessioned. Do not assume every collection uses the same numbering convention. A sequence that resembles a year needs the institution’s explanation before it becomes a historical date in your notes.
Build a short event timeline
If the record supplies manufacturing and acquisition dates, attach each date to its event. Keep approximate ranges and unknown periods visible. Acquisition by a museum is one stage in an object’s history, not evidence that the object was new when it arrived.
When writing a caption, state the supported production date and place collection information separately. If only an identifier is available, preserve it exactly and leave the production date unresolved. Precision in copying a number is valuable; inventing the meaning of its components is not.