30 C. Postal stamp "Semeuse" and 70 C. Charity issue "national monument Boulongesur Mer" with overprint in type I, front of cover with first day postmark "Dunkerque 1.07.40", very fine, expertized Dreyfus, Roumet and expertise Lothar Herbst VP (2025) "the condition is perfect. The stamps are only in very small number of pieces known, therefore are they very rare. ", Michel 900.-