20 Pfg Brandenburg Gate, block of four from upper margin - The Persuaders! Left values with variety "vertical unperforated" as well The Persuaders! Right values with variety "left unperforated" as well additional right lower stamp with defective or badly placed perforation, mint never hinged - the upper stamps wise fingerprints on, photo expertize Hans Dieter Schlegel BPP (2019), Michel 840.-