1 Fr+50 C. Charity stamp \"marshal F. Foch\", with double vertical as well inverted hand stamp overprint in type I, as properly franked single franking on cover from \"Ghyvelde north 24-7 40\" to Dunkerque with arrival postmark on the back from 25.7.40, faultless condition, expertized Dreyfus, Roumet, Tust BPP, photo expertize Krischke and expertise Lothar Herbst VP (2018) : \"the condition is perfect. Extremely rare. \"