1 Fr. postal stamp with overprint in type I as correctly franked mixed franking on cover from "Dunkerque 2. 7. 40" to Rosendael with reverse arrival postmark from 3. 7. 40, signed Pickenpack, Brun and certificate with photograph autumn VP (2014) : "the cover point at traces of usage on. The condition of the stamp is perfect. The stamps are only in very small number of pieces recorded, so that they very rare are. The postmark "Rosendael" is very rare. ", Michel 1. 000.-