10 C. Postal stamp Merkur head and 90 C. Special stamp "streets over the Col de I'Iseran" with hand stamp overprint in type I, correctly franked mixed franking on first days cover from "Dunkerque 01.07.40" to Ghyvelde with on the back arrival stamp from 02.07.1940, 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 1.000.-