Bengal Sultanate, Sikandar bin Ilyas (AH 758-792, 1357-1389 AD), Silver Tanka, 10.85 gms, Balda al Mahrusah Firuzabad Mint, Obv: in circular border al-Wathiq bi-Tayeed al-Rahman Abu al-Mujahid Sikandar Shah ibn Ilyas Shah al-Sultan, names of Rashidoons in small circles, separated by al-Imam al-azam wa al-Khalifat al-Mu’azzam, around. Rev: in scalloped cartouche, Yameen al-Khilafat Allah Nasir Amir al-Mumineen Ghauth al-Islam wa al-Muslimeen Khallada Khilafatahu, G&G # B192, very fine+, rare.