80 Pfg Germania with overprint "Sarre" in type I, block of four from cylinder upper margin (upper margin unused), left lower stamp with overprint error I "lens in the bar front left", in perfect condition mint never hinged, expertized Dr. Dub, Burger BPP and photo expertize brown BPP (2016) : "the quality is perfect. ", Michel 2. 850. - multiples of this stamp in faultless unhinged mint quality are extremely rare!