Sweden. Facit 9v6 cover , 12 öre blue, “Exclamation mark” variety (pos 53 in plate VI) on letter with notation "Prof." and with preserved cloth sample inside. Sent from KATRINEHOLM 16.6.1868 to Svenljunga. Some imperfections. Only a few examples of this scarce and sought-after variety on cover are recorded, as well as only a few samples are recorded from the CoA period.