80 Pf Germania Sarre, block of four from cylinder upper margin in perfect condition mint never hinged, as well the left lower stamp with overprint plate flaw "lens in the bar front left" (field 19) (Michel. No. 16 I W upper margin (2), 16I and 16I PF I), expertized Burger BPP and photo expertize brown BPP: "the quality is perfect. " Michel 4050,