1 Tanka - Sher Shah Suri Ujjain mint

Sher Shah Suri's administrative reforms extended well beyond taxation and road-building — his standardization of the silver rupee (the tanka being a direct predecessor in nomenclature if not always in weight standard) was explicitly designed to displace the degraded coinage left by the later Lodis and the disrupted Mughal issues of Humayun, whom Sher Shah had driven into Persian exile in 1540. The Ujjain mint served a strategically vital corridor through Malwa, a region Sher Shah brought firmly under Sur control only after the campaign of 1542–43.

Sher Shah was killed at Kalinjar in May 1545, leaving fewer than five years of his own coinage in circulation.