mixed franking from 4 Din. with 16 Din. on properly franked airmail foreign countries R letter in the second weight category over 20 g to 40 g to Kolmar in the Alsace with posting cancel BEOGRAD 1 / 19 from 21.6.44 and registered cancel Beograd 1 as well with censor label the international country letter test place Vienna and arrival postmark KOLMAR from 29.5.44; photo expertize Brunel "the cover was a little improper opened, otherwise is the document in good condition.