20 C. Postal stamp in the horizontal pair with overprint in type II, impeccable unused with full original gum and small rest of hinge, reverse partial cancel of the authentic Postmark from \"Coudekerque business\" as authenticity confirmation, unsigned, photo expertize Lothar Herbst VP (2016) : \"the condition is perfect. Due to the very small edition from only approximate 80 to 100 pairs are these stamps very rare. \"