15 Pfg numerals, bright yellow ochre with retroactive lines perforation 11 from post office Klotzsche (so called. Postmaster perforation), in perfect condition mint never hinged and unsigned outstanding quality, photo expertize Kunz BPP (2016) : "genuine and in perfect quality. From this color type are with Klotzsche perforation so far only a few examples known. ", Michel 5.000.-