50 H. To 2 Kc. Children s help, on two letter pieces with special cancel "Liberec German Reichspost eighth of October 1938 Heil Hitler", slightly brown perf tips disturb the general view hardly, limited edition from only 5 sets, expertized Mahr BPP as well photo expertize Robert Brunel VP (2016) "the stamps are very rare", Michel 12.000.- - Top-rarity