50 C. \"Merkur head\" in a horizontal pair with overprint in rare type II, properly franking on cover from \"Coudekerque business 8.08.1940\" to Dunkerque with arrival cancel from 9.08.1940, impeccable, signed, expertise Lothar Herbst VP (2023) : \"the condition is perfect. The stamps are only in very small edition of 1. 500 pairs issued become, therefore are they rare. Postal service pieces from Codekerque business are extremely rare, there general only very few covers so far are known. \", Michel 5.000.-