Multiple franking over 7 Din. (pair) on correctly franked foreign countries airmail R cover to Bitterfeld with postal stamp BEOGRAD 1 / 15 from 18. 8. 43 as well with censorship treatment through the international country letter test place Vienna and arrival postmark camp Mary / BITTERFELD from 25. 8. 43 and sticky "unknown / inconnu", and handwritten "at sender adress return" with stamp "returned" as well with an additional censorship through the international country letter test place Vienna and arrival postmark BEOGRAD from 2. 9. 43, legitimate condition