50 H. Philatelic exhibition Pilsen with hand-stamped imprint "We are free! + Swastika", horizontal lower margin pair together with 2 Kc. Klingenberg with the same imprint on a letter with a special stamp "Reichenberg 1 German Reich Post 8. OCT. 1938 Heil Hitler!" to Neugersdorf, not postally forwarded, edition of 200 or 250 pieces, photo certificate Brunel VP (2020) "The condition is flawless... Pairs are rare.", Michel 700.- +