50 C. Postal stamp blackish blue, vertical pair from corner margin lower right with date of printing\" 6.10.38\" with overprint \"Occupied area North France\" in type II, reverse as usual partial cancel of the Postmark \"Coudekerque business\" as authenticity marking, impeccable mint never hinged, expertized Tust BPP, Brun and expertise Lothar Herbst VP (2023) : \"the condition is perfect. Due to the small issue from only approximate 1.500 pairs are these stamps very rare. With date of printing are only max. 30 pairs possible, therefore are such stamps extremely rare. \", Michel 2.340.- provenance: expertization collection Wolfgang Tust (compare 29. HBA auction 1997)