1 Mark on 10 Pfg airmail with overprint \"Gelber Hund\", in perfect condition mint never hinged and having very fresh colours, unsigned with photo certificate Brettl BPP: \"faultless condition. Entirely mint never hinged, without hinge. \", Michel 2.500.- we obtained for a comparable copy in of our 186. Auction 1.400.- Euro as well percentage of bid price!