50 H. Stamp exhibition Pilsen with hand stamp overprint "we are free! Plus swastika" in the horizontal gutter pair, on faultless blanko-envelope with special cancel "Liberec 1 German Reichspost eighth of October 1938 Heil Hitler! ", edition 200 pieces - of it few as gutter pair! Photo expertize Brunel VP (2020) "the condition is perfect. Gutter pairs rare. ", Michel 650.-