Mixed franking from 2 Din. With 16 Din. On correctly franked foreign countries special delivery registered cover to Berlin with postal stamp BEOGRAD 1 / 21 from 28. 2. 44 and registered postmark Beograd 1 as well with censorship seal and additional censorship postmark Ag the international country letter test place Vienna and with arrival postmark on the back BERLIN REINICKENDORF east from 7. 3. 44