50 C. Postal stamp with vertical overprint \"Occupied area North France\" in type I, early impression, block of four from corner margin lower left with date of printing \"4.1.39\", impeccable mint never hinged, in the margin of sheet separated, issued only 3.000 pairs - with date of printing are only 60 piece possible and in particular as early impression rare! Expertized Brun, Behr among others as well expertise Lothar Herbst VP (2023) \"the condition is perfect. \"