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 Vienna with posting cancel BEOGRAD 1 / 15 from 14.12.43 as well with censor label the international country letter test place Vienna and on the back arrival postmark Vienna from 19.12.43; attest Brunel: "the cover point at format contingent signs of transportation on.