50 C. Special edition "world exhibition 1937 in Paris", horizontal pair with overprint "Occupied area North France", mint never hinged, faultless condition, pair from public ownership - actual were all pieces for covers used, mint never hinged pieces places large rarities of the collection areas dar, signed Calves, photo expertize Gerhard Krischke and expertise Lothar Herbst VP (2023) "the condition is perfect. Until today me no 10 pairs have become known. "