BENGAL: Iltutmish, 1217-1236, AR tanka (10.32g), [Lakhnauti], Vikrama [12]77, G-B18, horseman, holding mace in his right hand, galloping left, some minor adhesions on reverse, with Nagari Sri above the name iltutmish, bold VF, R. The date is equivalent to AD1220/21 and is the earliest known numerical date on an Indian coin (earlier numbers as regnal or issue years are known, but not as actual dates, e.g., the fanams of Orissa), engraved in Nagari numerals.
Estimate: 600-800 USD