Mixed franking from 4 Din. With 16 Din. On correctly franked airmail foreign countries R cover the 2. weight step over 20 g to 40 g to Kolmar in the Alsace with postal stamp BEOGRAD 1 / 19 from 21.6.44 and registered postmark Beograd 1 as well with censorship seal the international country letter test place Vienna and arrival postmark KOLMAR from 29.5.44