Iltutmish was the ruler of the Delhi Sultanate who ruled the dynasty from 1211 to 1236 AD. He was one of the slaves of Qutb-ud-din Aibak who later became his Son-in-Law. He conquered Multan and Bengal from contesting rulers, and Ranthambhore and Siwalik from their rulers.
Coinage system under Iltutmish possessed some distinctive features. Iltutmish introduced the silver Tanka and the copper Jital-the two basic coins of the Sultanate period, with a standard weight of 175 grains.
One of his Silver Tanka listed at Classical Numismatic Gallery at 12,000-15,000. The obverse of this coin inscribed with Arabic legend ‘al-Sultan al-'Azam Shams al-Dunyawa al-Din Abu al-Muzaffar Iltutmish al-Sultan in double square and date and taxation details in margin. The reverse of a coin depicts the ‘Fi Ahd al-Imam al-Mustansir Amir al-Mumineen’ in double-lined rectangle; mint details in margins.
Image Source: Classical Numismatic Gallery