Al-imam al-azam abu'l mujahid sikandar shah ibn ilyas shah al-sultan / Yamin khalifat allah nasir amir al-muminin khallada allah khalifatahu, mint and date in the reverse margin (partially readable). Uncertain mint (probably Hadrat Firuzabad, completely off-flan), date clear (771 AH (1368 CE)). 26mm, 10.61 grams. "The coins of Indian Sultanates" #B181 or similar. 

Sikandar Shah was the second ruler of the Ilyas Shahi dynasty in Bengal, succeeding his father Shamsuddin Ilyas Shah. Reigning from about 1357 to 1389, he consolidated and expanded the Bengal Sultanate, maintaining its independence from the Delhi Sultanate and strengthening administrative control over the region. His most notable architectural achievement is the construction of the massive Adina Mosque, one of the largest mosques in the Indian subcontinent, symbolizing both his power and Bengal’s growing prosperity. Sikandar Shah’s long reign brought relative stability, though toward its end he faced internal conflict, including a rebellion led by his son, Ghiyasuddin Azam Shah, who eventually succeeded him.