Mixed franking from 2 Din. With 4 Din. (vertical pair) on correctly franked international registered letter to Prague in the Protectorate Bohemia and Moravia with postal stamp PETROVGRAD 1 / 14 from 2.5.44 and registration label with German toponym GROSSBETSCHKEREK 1 as well with censorship seal the international country letter test place Vienna and with arrival postmark Prague 1 from 10.5.44 on the letter back. The cover is very fine. Expertized. Krischke