50 C. "unemployed children" (2) with overprint in type I as correctly franked multiple franking on cover from "Dunkerque 1. 7. 40" (first day) to Dunkerque 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.-