Imperial Bank of Persia, colour trial 10 tomans, Teheran, ND (1924), no serial numbers, brown, pale orange and pale green, Shah Muzzafar-al-Din at right, value at centre and at each corner, two printed signatures below, reverse brown, value at centre and at left(Pick 14ct), red SPECIMEN WATERLOW & SONS LTD in field, cancellation holes, some small stains and mounting traces, in PCGS holder 62, uncirculated and very rare