2, 25 Fr. Plus 25 C. Charity stamp \"Dr. Claude Bernard\" with overprint \"Occupied area North France\" in type II, impeccable mint never hinged - with on the back strike of the Postmark \"Coudekerque business\" and signatur of the post office leader as authenticity marking, issued only 80 - 100 examples - very rare, expertized Tust BPP, Dr. Dartayre and expertise Lothar Herbst VP (2023) \"the condition is perfect. \", Michel 3.000.- - provenance: expertization collection Wolfgang Tust (29. HBA auction 1997)