Souvenir sheets issue "Debria" with scarce plate flaw III "slanting white line over 1 of the date 9.3.1950 at the right sheet margin" (only in a part of issue occurring), in perfect condition unused with original gumming, signed on the base Paul BPP (for mint never hinged) and new photo expertize Dr. Ruscher BPP (2019) : "unused, the quality is perfect. ", Michel for ** 500.-