Imperial Bank of Persia, uniface obverse and reverse proof 25 tomans, Teheran, ND (ca 1890), black, lilac, yellow, pink and green, Shah Nasr-ed-Din at right, Imperial arms at left, value at centre and at each corner, reverse blue, Imperial arms at centre, value at centre and at each corner,(Pick 6 for type), perforated SPECIMEN, in PCGS holders 58 PPQ, choice about uncirculated, and 62, uncirculated, reverse with corner tip missing, extremely rare (2)
