Nasir-al-Din Muhammad is also known by his regnal name, Humayun, was the second ruler of the Mughal Empire. He ruled over the territory of Afghanistan, Pakistan, and parts of northern India and Bangladesh from 1530–1540 AD and again from 1555–1556 AD.
Humayun lost his kingdom early and was forced to flee India under the Afghan resurgence led by Sher Shah Suri. He sought refuge with Tahmasp Safavi, the king of Iran. Tahmasp granted Humayun asylum on the condition he converts to Shi'ism.
In 1545, a joint expedition under the charge of Humayun subsequently engaged Qandahar which was occupied by Humanyun’s rebellious brother Kamran. Humayun conquered the fort and city, nominally on behalf of Tahmasp. Both the facts - Humayun's conversion to Shi'ism and his vassalage to Tahmasp are reflected in legends on his coin. The conquest of Qandahar allowed Humayun a much needed strategic foothold to begin his re-conquest of India.
On 23 July 1555, Humayun once again sat on Babur's throne in Delhi. This silver Tanka depicted above was issued by Humayun during his second reign. The obverse of a coin inscribed with Shahada within rectangular border and names of Khalifa-e-Rashidoon around. The reverse of a coin depicts Persian legend ‘Muhammad Humayun Badshah Ghazi’ within a centre, other titles around.
Image Source: Classical Numismatic Gallery