25 Pf Germania Sarre in b-colour with overprint type I, block of four upper margin cylinder in perfect condition mint never hinged, as well left upper stamp with overprint plate flaw "upper sheet of the S broken" (field 2) (Michel. No. 9bI M W upper margin, 9bI W upper margin, 9bI (2), expertized Burger BPP and photo expertize brown BPP: "the quality is perfect. "