50 H. Stamp exhibition Pilsen with hand stamp overprint "we are free! Plus swastika", horizontal lower margin pair in conjunction with 2 Kc. Blade mountain with same overprint on cover with special cancel "Liberec 1 German Reichspost eighth of October 1938 Heil Hitler! " to Neugersdorf, postal not transported, edition 200 respectively 250 piece, photo expertize Brunel VP (2020) "the condition is perfect. Pairs rare. ", Michel 700.- plus