45 C. Postage stamps issue "Merkur head" and 55 C. Charity issue "ambulance service monument" with hand stamp overprint in type I, properly franked mixed franking on cover from "Dunkerque 11.07.40" to Ghyvelde with on the back arrivals cancel from 12.07.1940, very fine, expertized Calves, 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 1.100.-