12 penny Nuremberg Nazi Party Congress with inverse watermark Y \"flank to the right\", corner margin piece top left (field 1, rest of hinge in the upper margin), stamp impeccable mint never hinged, expertized Peschl BPP and photo expertize MMag. Peter Stastny VPEX (2018) \"genuine and immaculate\", Michel 600.- / handbook corners 1.000.- for **