50 C. Postal stamp "peace allegory" with overprint in type I (similar Michel-no. 2 I respectively 2 II), variety "inverted overprint", vertical pair as properly franked multiple franking on cover from "Ghyvelde 22.07.1940" to Dunkerque with reverse arrival postmark from "23.07.1940", faultless condition, expertise Lothar Herbst VP (2018) : "the condition is perfect. The stamps are only in very small number of pieces known, therefore are they very rare. ", Michel 800.-