...
Use the 500 field(s) to record additional information about the items cataloged, including details about the title, statement of responsibility, edition, collation formula, language of publication, etc. For information specific to Princeton copies, add a subfield ‡5 followed by the MARC organization code for Princeton Library (NjP).
Copy designations in the ‡3 such as "Princeton copy 1" should be paired with a parallel note in the 866 ‡z. See documentation on Holdings Records for more detail.
Examples of notes recording copy-specific details about local items:
...