20 Kop. on 1 Kop. orange unwatermarked (!) in perfect condition on piece (from expert for checking purposes soaked off and with hinge again mounted), used "PSKOW -a 18 10 41", photo expertize Zirath BPP (2018) : "the condition of the stamp is perfect and the perforation is for this issue typically. ", issued only 100 pieces - one of the large rarities German occupation II. world war!