35 C. Postal stamp Semeuse and 65 C. Charity issue \"Jean Baptiste Charcot\" with hand stamp overprint in type I, properly franked mixed franking on first days letter from \"Dunkerque 01.07.40\" to Ghyvelde with on the back arrival stamp from 02.07.1940, faultless preservation, unsigned, expertise Lothar Herbst VP (2018) : \"the preservation is perfect. The stamps are only in very small number of pieces known, therefore are they very rare. \", Michel 800.-