50 C. Postal stamp peace allegory in the vertical upper margin pair with vertical overprint in type I as properly franked 1 Fr. Franking on letter from \"Ghyvelde 26.7.40\" to Dunkerque north with reverse arrival stamp from 27.7.40, signed Dreyfuss, Roumet and photo expertize Lothar Herbst VP (2015) : \"the condition is perfect. The stamps are only in small number of pieces known, therefore are they rare. \" Michel 600.-