50 C. postal stamp "Merkur head" with overprint "Occupied area North France" in type I, properly franking on local letter from "Dunkerque 1 7 40" (first day) with arrival postmark on the back from 2.7.1940, very fine, expertized H. Krause, Pickenpack BPP and expertise Lothar Herbst VP (2025) "the condition is perfect. ", Michel 600.-