10 C. And 90 C. Postal stamps \"Merkur head\" respectively \"peace allegory\", with horizontal, over both stamps passing over hand stamp overprint \"Occupied area North France\" in type I, front of cover with cancellation \"Dunkerque 20.07.1940\", faultless condition, expertized Calves and expertise Lothar Herbst VP (2023) \"the condition is perfect. The stamps are in very small number of pieces known, therefore are they very rare. \", Michel 500.-