Today I got this nice card. It commemorate the 350th anniversary of the university of Kiel. The University of Kiel was founded under the name Christiana Albertina on 5 October 1665 by Christian Albert, Duke of Holstein-Gottorp. It's a special card made for this special Jubilee. On the card there are six stickers with the university logo. On the card I got the matching stamp with special postmark.
Christian-Albrechts-Universität Kiel (0,62 ct) - "Markenset" Issued: 07-05-2015 with special postmark
Thanks to Daniel for sending me this card in an envelope!