10 C. Postage stamps issue "Merkur head" and 90 cent charity issue "50 years Eiffel Tower" with hand stamp overprint in type I, properly franked mixed franking on cover from "Dunkerque 02.07.40" to Ghyvelde with on the back arrival cancel from 03.07.1940, 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 1.000.-