Souvenir sheets issue "10 years German help in need", especially attractive with on of this issue scarce special cancel "Königsberg (Pr. ) Ostropa 26.6.35" cancelled, full original format, faultless choise copy condition, without signs, photo expertize Hans-Dieter Schlegel BPP (2019) : "the quality is perfect. ", Michel 14.000.- - in this perfect and nice cancelled condition only hard to find!