English: Coin minted in Gaur, Bengal during the Delhi Sultanate. Photo taken at the South Asia gallery in the British Museum.

"Bakhtiyar himself struck a gold coin in the name of his overlord in Delhi, Sultan Muhammad Ghuri, with one side depicting a Turkish cavalryman charging at full gallop and holding a mace in hand. Beneath this bold emblem appeared the phrase Gauḍa vijaye, “On the conquest of Gaur” (i.e., Bengal), inscribed not in Arabic but in Sanskrit. On the death of the Delhi sultan six years later, the governor of Bengal, Ali Mardan, declared his independence from North India and began issuing silver coins that also bore a horseman image. And when Delhi reestablished its sway over Bengal, coins minted there in the name of Sultan Iltutmish (1210–35) continued to bear the image of the horseman."

From the chapter on The Articulation of Political Authority in The Rise of Islam and the Bengal Frontier by Richard M. Eaton.