Imperial Bank, Specimen 1000-Tomans, undated (c.1890), green and pink, arms at left, Shah Nasr ed Din at right, value at each corner, rev. purple, serial no. L 00001 - L 00500, arms at centre (P.10), 'Sep 19.90' in pencil in top margin, perforated SPECIMEN B W & CO LONDON, uncirculated, extremely rare, an impressive note