50 C. Merkur head, vertical pair from left margin of sheet with overprint "Occupied area North France" in type I, properly franked multiple franking on cover from "Ghyvelde 22.07.1940" to Dunkerque with arrival postmark on the back from 23.07.1940, very fine, expertized Pickenpack, expertise Lothar Herbst VP (2025) "the condition is perfect. the stamps are only in small number of pieces known, therefore are they rare. ", Michel 600.-