6 Pfg numerals black blue green, perforated L 11 (officially experimental perforation), block of ten from lower margin, as well plate flaw II on two stamps and plate flaw VII on a value, in perfect condition mint never hinged, new abridged certificate Dr. Jasch BPP (2017) : "genuine and immaculate", Michel 2.300.- (free of premium for The Persuaders! Plate flaw)