45 C. Postal stamp Merkur head and 55 C. Charity issue \"Hector Berlioz\" with hand stamp overprint in type I, properly franked mixed franking on cover from \"Dunkerque 21.07.40\" to Ghyvelde with on the back arrival stamp from 22.07.1940, faultless preservation, unsigned, expertise Lothar Herbst VP (2018) : \"the preservation is perfect. The stamps are only in very small number of pieces known, therefore are they very rare. \", Michel 1.300.-