2, 50 Mark on 2 Mark Germania "north and south" in the engraved printing, dark carmine pink, from left, not throughout perforeted side margin, position 9, with plate flaw IV, to Infla volume 79 "red line over the left blade" as a single franking on a strong over franked registered local letter, used "Erford * 1a 9.7.20 5-6 N", excellent condition, signed Duentsch front left and "b" besides of the stamp, INFLA signature Bauer BPP "b" reverse (double), photo expertize Dieter Weinbuch BPP (2025), "the stamp is in perfect quality, cover with small signs of transportation and small discolouration", Michel / Infla Band79 600.- (former starting price 200)