10 C. definitive issue "Mercury Head" and 90 C. special issue "Guillotiere Bridge in Lyon" with hand-stamped overprint "Occupied Territory Northern France" in Type I, appropriate mixed franking on a letter from Ghyvelde 29. 07. 1940 to Dunkerque with reverse arrival stamp dated 30. 07. 1940, Michel number 159 has some nibbed perforation at the top, expertise by Lothar Herbst VP (2023) "The overall condition is flawless. The stamps are known in very small quantities, therefore they are very rare.", Michel 700.-