5 C. Postal stamp \"Merkur head\", carmine, horizontal pair with overprint \"Occupied area North France\" in type II, mint never hinged, blunted and short perforation, on gum side toned, otherwise faultless condition, reverse postmark \"Coudekerque business\" as authenticity confirmation, issued only 80 - 100 pairs, expertized Ceres, Calves and expertise Lothar Herbst VP (2023), Michel 2.500.-