1965, special delivery letter from Berlin to Klausa by Altenburg, franked with special stamps to 25 penny and 40 penny as well an essay 20 penny Karl Marx black / red, the essay is a draft from Appelmann for a not issued Karl Marx stamp of these be still further examples in the Postal Museum in Berlin find, however no further piece on cover used known is, the origin this essays is unexplained, full particulars see detailed photo expertize Dr. Peter Tichatzky BPP