10 C. Postal stamp \"Merkur head\" and 90 C. Special stamps issue \"battle ship Clemenceau\" with overprint in type I, properly franked mixed franking on cover from \"Dunkerque 14.07.1940\" to Ghyvelde with reverse arrival postmark from 15.07.1940, faultless condition, expertized Dreyfus, Roumet, Tust BPP 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.-