Mixed franking from 1 Din. With 7 Din. (3) on the back of a properly franked airmail foreign countries special delivery registered mail letter to Stribrne Hory in the Protectorate Bohemia and Moravia with postal stamp BEOGRAD 1 / 15 from 17.11.43 as well with censorship seal the international country letter test place Vienna; good condition, expertized Brunel