6 Pfg numerals black blue green, perforated L 11 (officially experimental perforation), block of twelve from corner margin lower left, as well plate flaw V on a stamp and plate flaw VIII on a value, in perfect condition mint never hinged, new abridged certificate Dr. Jasch BPP (2017) : "genuine and immaculate", Michel 2.860.- (free of premium for The Persuaders! Plate flaw)