Sweden. Facit 9v6 brev, 12 öre blue, “Exclamation mark” variety (pos 53 in late VI) on letter with notation "Prof." and with preserved cloth sample. Sent from KATRINEHOLM 16.6.1868 to Svenljunga. Small 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.