80 cent special stamps issue "100. Day of death C. J. Rouget de Lisle" and 20 C. Charity issue 20 C. "marshal J. Joffre", with hand stamp overprint in type I, correctly franked mixed franking on cover from Dunkerque 14.07.1940 to Ghyvelde with on the back arrival stamp from 15.07.1940, expertise Lothar Herbst VP (2018) : "the condition is perfect. The stamps are general only in very small number of pieces known, therefore are they very rare. ", Michel 1.400.-