35 C. Postal stamp Semeuse and 65 C. Charity issue "society for hygiene" with hand stamp overprint in type I, correctly franked mixed franking on cover from "Dunkerque 05.07.40" to Ghyvelde with on the back arrival stamp from 06.07.1940, faultless condition, unsigned, expertise Lothar Herbst VP (2018) : "the condition is perfect. The stamps are only in very small number of pieces known, therefore are they very rare. ", Michel 1.500.-