50 C. Postal stamps \"peace allegory with new value 50 C. \", variety \"inverted overprint\", vertical pair as properly franked multiple franking on small-format, charming ladies letter from \"Dunkerque 04.07.1940\" to Ghyvelde with reverse arrival postmark from \"05.07.1940\", faultless preservation, 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, especially they who with inverted overprint. These postal stamps count already to the Favorite the rarities from the public. \", Michel 1.800.-