mixed franking from 4 Din. with 16 Din. on properly franked airmail foreign countries R letter with advice of delivery to Sonneberg in Thuringia with posting cancel BEOGRAD 1 / 24 from 9.4.43 as well with censor label the international country letter test place Vienna and arrival postmark SONNEBERG (Thuringia) 1 from 15.4.43; the cover is at the lower margin cut in, attest Kleymann: "these franking combination is rare. the condition is perfect.