Bengal Sultanate, Rukn al-din Ali Mardan (AH 606-609/10, 1210/11-13 AD), Gold Fractional Tanka, 2.29 gms, Horseman type, Obv. King riding a horse to right holding a mace, with legend in the margin Shahada and date, Rev. al sultan al muazzam al duniya wa’al din abu al-muzaffar Ali Mardan, G&G #B7, extremely fine for the type, extremely rare.