This is asilver square rupee from the Mughal Empire, specifically issued during the reign of Emperor Akbar (reigned 1556-1605 CE). These coins are well-known for their distinct square shape, which was one of several experimental forms Akbar introduced to his coinage, including round and rectangular varieties.
The coin typically features Persian calligraphy. One side (the obverse) often displays the Kalima (Islamic creed: "There is no God but Allah, Muhammad is the messenger of Allah").
