3 pfennigs, blackish brown orange, 6. community congress in Berlin and Munich, 1936, corner margin block of four from the left lower corner of the sheet, upper left stamp with plate flaw I: "M instead of VI", the left lower stamp with plate flaw II: "tear in the tower and M instead of VI", in mixed franking with Michel number 619 and 1 pfennigs Hindenburg permanent issue, Michel number 512 X, on international letter to Brussels, cancelled "WIESBADEN 16.6.36", properly franked franked, very fine, expertized E. Peschl, photo expertize Hans Dieter Schlegel BPP (2000) "stamps and postmark genuine, properly franked franked