25 C. Postal stamp \"Merkur head\", vertical pair, with vertical hand stamp overprint in type I, as well a vertical pair the same stamp however without overprint, together as properly franked mixed franking on cover from \"Ghyvelde north 29-7 40\" to Dunkerque with arrival postmark on the back from 30 -7 40, faultless condition, expertise Lothar Herbst VP (2018) : \"the condition is perfect. Very rare. \"