50 H. Briefmarkenausstellung Pilsen with black printing imprint "Wir sind frei! + Hakenkreuz" and a variant of the imprint where "the upper bar of the swastika is missing" in a side margin block of six with five normal stamps, perfectly mint never hinged, certified by Mahr BPP and photo certificate Brunel VP (2012) "The condition is flawless.", Michel 600.-