5 C. postal stamp (horizontal pair) with special issue "hygiene" always with overprint I on correctly franked cover from "Dunkerque 1. 7. 40" (first day) to Arneke with reverse arrival postmark from 3. . 7. 40, the pair of postage stamp in perfect condition, the special issue with defective perforation right, signed Pickenpack and certificate with photograph autumn VP (2014) : "the stamps are only in very small number of pieces recorded, so that they very rare are. ", Michel 1. 000.-