Arabic inscriptions within a square, and in the margins: al-sultan al-azam ghiyath al-dunya wa'l din abu'l muzaffar bahadur shah al-sultan bin sultan / Al-Imam al-Mustasim Amir al-muminin in a double square, date and mint in the circular margin around (date partially visible, 721 AH = 1321) . 27mm, 10.7 grams. Mint of Lakhnauti (either Khitta or Shahr - the epiphet is off flan). "The Coins of the Indian Sultanates" B108-109. 

Ghiyas al-Din Bahadur was a short-lived ruler of Bengal from 1320 to 1324, during the waning influence of the Delhi Sultanate over the region. Likely a local or semi-independent governor, he asserted authority in eastern Bengal amid the political fragmentation that followed the decline of central control. His rule reflects a transitional period before the rise of a fully independent Bengal Sultanate later in the 14th century. 

The Bengal Sultanate was an independent Muslim kingdom that ruled much of Bengal from the mid-14th to the late 16th century, emerging when regional governors broke away from the weakening Delhi Sultanate. Founded by Shamsuddin Ilyas Shah, it unified Bengal and developed into a prosperous trading state with strong links to the Middle East and Southeast Asia. The sultanate was known for its cultural blending of Islamic and local Bengali traditions, reflected in its architecture and coinage. It reached its height under rulers like Alauddin Husain Shah, before gradually weakening due to internal strife and external threats, eventually being absorbed into the expanding Mughal Empire under Akbar in the late 1500s.