70 C. And 30 C. \"Merkur head\" with overprint in type I, properly franking on cover from \"Dunkerque north 21 7 40\" to Ghyvelde with on the back arrival cancel from 22.7.1940, faultless condition, expertized Dreyfus, Roumet and expertise Lothar Herbst VP (2023) : \"the condition is perfect. The stamps are only in very small number of pieces known, therefore are they very rare. \", Michel 800.- from us never before offered franking-combination!