45 C. And 15 C. Postal stamp "Merkur head" and 40 C. Charity issue "soldiers" with overprint in type I, correctly franked mixed franking on letter from "Ghyvelde 5.07.1940" to Dunkirk with reverse arrival postmark from "6.07.1940", 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 very rare. ", Michel 1.100.-