40 C. Postage stamps issue "Merkur head", 20 C. And 40 C. Special stamps "100. Day of death C. J. Rouzget de Lisle" with hand stamp overprint in type I, correctly franked mixed franking on cover from Dunkerque 14.07.1940 to Ghyvelde with on the back arrival stamp from 15.07.1940, expertise Lothar Herbst VP (2018) : "at the Michel-no. 64 is the left upper corner perforation round corner, undisturbing. The other condition is perfect. The stamps are only in very small number of pieces known, therefore are they very rare. The Michel-no. 64 belongs to the Favorite the postal stamps. ", Michel 3.500.-