35 C. Postal stamp "Semeuse" and 65 C. Postal stamp "peace allegory" with overprint in type I, correctly franked mixed franking on cover from Dunkerque 2.07.1940 to Ghyvelde with on the back arrival stamp from 3.07.1940, faultless condition, expertise Lothar Herbst VP (2019) : "the condition is perfect. The stamps are only in very small number of pieces known, therefore are they extremely rare. The stamp to 65 C. Peace allegory belongs to the Favorite the rarities from the public. . . . Not yet by Michel catalogue listed. "