Souvenir sheets issue "Semendria" with special cancel BEOGRAD 1 / 1 from 25.9.41 in black colour on the perforated souvenir sheet as well with First Day special cancellation BEOGRAD 1 / 1 from 22.9.41 in black colour on the cut souvenir sheet, certificate Krischke "used are these souvenir sheets rare. ", Michel 1800,-