Proof: \"Pleskau\" on 60 Kop. Postal stamp, cancelled \"PSKOW -k -9.9.41\" on piece, faultless condition, issued only 65 examples - of it only a few in cancelled condition, expertized Gachot KK and Dr. Rommerskirchen BPP, photo expertize Walter Zirath BPP \"a very scarce cancelled stamp. \"