15 C. postal stamp (2) and 75 C. "pierre Corneille - Poet of the Cid" with overprint in type I as mixed franking on at 5 C. postage exceeding tariff rate cover from "Dunkerque 1. 7. 40" (first day) to Arneke with reverse arrival postmark from 2. 7. 40, in perfect condition condition, signed Zierer and certificate with photograph autumn VP (2014) : "the condition is perfect. The stamps are only in very small number of pieces recorded, so that they very rare are. ", Michel 1. 000.-