25 C. Postal stamp \"Merkur head\", block of four from lower margin, with horizontal, centered over all fours stamps passing over hand stamp overprint in type I, variety \"inverted overprint\", as properly franked multiple franking on cover from \"Ghyvelde north 29-7 40\" to Dunkerque with arrival postmark on the back from 30.7.40, faultless condition, signed Dreyfus, Roumet, expertise Lothar Herbst VP (2018) : \"the condition is perfect. \"