50 C. Plus 10 C. Charity stamp \"unemployed children\" in conjunction with horizontal pair 25 C. Postal stamp \"Merkur head\" with in each case horizontal overprint, tariff right on clean printed form letter with first day postmark \"DUNKERQUE 1 - 7 40\" to Arneke with arrival postmark on the back from 3.7.40. Expertise Lothar Herbst VP (2022) : \"the corner perforation of the left stamp right above is a little round corner. The other condition is perfect. \", First-Day-Covers with stamps from public ownership are rarely offered!