50 C. Postal stamp "peace allegory" with overprint in type I (similar Michel-no. 2 I respectively 2 II), vertical pair as correctly franked multiple franking on letter from "Dunkerque 14.07.1940" to Ghyvelde with reverse arrival postmark from "15.07.1940", 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 600.-