15 C. And 45 C. Postage stamps issue \"Merkur head\" as well 40 C. Charity issue \"Hector Berlioz\" with hand stamp overprint in type I, properly franked mixed franking on cover from Dunkirk 4.07.1940 to Ghyvelde with on the back arrival stamp from 5.07.1940, in perfect condition, 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 1.400.-