40 C. "Chavannes" and 70 C. "Births decline" with overprint in type I being a mixed franking on about 10 C. postage exceeding tariff rate cover from "Dunkerque 1. 8. 40" to Bailleul with reverse arrival postmark from 2. 8. 40, left stamp top left with not disturbing manufacture contingent corner crease - otherwise faultless, 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. The postmark "Bailleul" is very rare. ", Michel 1. 000.-, provenance collection Horst bolder (former starting price 250)