1 Tanka - Sher Shah Suri Gwalior mint

Sher Shah Suri's administrative reforms extended well beyond taxation and road-building — his standardization of the silver rupee (tanka) established the weight and fineness benchmarks that Mughal emperors would maintain for generations. The Gwalior mint was among the more strategically significant in his network, operating from a fortress city he had wrested from Mughal control after Humayun's flight to Persia in 1540. Sher Shah held the city and its mint for the remainder of his reign, killed in 1545 at the siege of Kalinjar when a ricocheting rocket ignited an ammunition store.