10 C. Postal stamp "Merkur head and 90 C. Postal stamp "peace allegory" with overprint "Occupied area North France" in type I, on front of cover with cancellation "Dunkerque 20.07.1940", faultless condition, expertized Brun expertise Lothar Herbst VP (2023) : "the condition is perfect. The stamps are only in very small number of pieces known, therefore are they very rare. ", Michel 700.-