45 C. Postage stamps issue "Merkur head" and 55 C. Charity issue "ambulance service monument" with hand stamp overprint in type I, mixed franking on front of cover with first day postmark from "Dunkerque 1.07.40", expertized Dreyfus, Roumet and expertise Lothar Herbst VP (2025) "the condition is perfect. The stamps are only in very small number of pieces known, therefore are they very rare. ", Michel 700.-