Imperial Bank of Persia, uniface obverse and reverse proofs for 100 tomans, Teheran, ND (ca 1890), black, pink and green, Shah Nasr-ed-Din at right, Imperial arms at left, value at centre and at each corner, two printed signatures below, reverse orange-brown, Imperial arms at centre, value at centre and at each corner(Pick 8 for type), perforated SPECIMEN, in PCGS holders 50, about uncirculated, with tear at right, and 63, choice uncirculated, very rare