80 Pfg Germania with overprint "Sarre" in type I, block of four from rotary printing under margin (separated), each stamp with overprint error - included are the overprint error A (2), L and QI, in perfect condition mint never hinged, signed, photo expertize brown BPP (2017) : "the quality is perfect. ", Michel 3. 600.- (free of premium for the scarce unit! )