A report telling me which retention of media was used for a restore.

This is a long shot, but I want to try and evaluate the usefulness of our longer term backups in other words : wherever we have done a restore I wish to know which retention of media were used. If you can assist me in obtaining this information I would be most grateful. I'm running 7601 anayltics.

Equally if you happen to know its not possible, then knowing that will save me time and effort looking.

Thanks in advance,Jim