50 Fr. Postal stamps special edition \"airman Clement Ader\" with overprint \"Occupied area North France\" in type II, mint never hinged, faultless condition, issued only 1 copy - one of the rarest German postage stamps ever, expertized Scheller and expertise Lothar Herbst VP (2024) \"the condition is perfect. To almost 30 years intensely research is only this 1 copy known. This unique is the largest Dunkirk rarity as well also of all occupation issues in the World War II and is therefore also already an extremely scarce world rarity. \" - provenance: illustration piece by Michel special catalog for Germany volume 1 - the unique opportunity be the crown jewel of this collecting area to get thus the possibility on offer the only to be closed, the a complete collection to this collecting field structure can!