Bengal Sultanate, Ghiyath ud-din A’zam (AH 792-813/1389-1410 AD), Hadrat Firuzabad Mint, Silver Tanka, Obv : Ghiyath ud dunya wa’l din abu’l muzaffar A’zam Shah al-sultan in square, al-sultan al a’zam al-mu’ayyad bi-ta’yid al-mulk al-rahman in margin, Rev : Nasir amir al-mu’minin ghawth al-islam wa’l muslimin khuld mulkahu, mint name in margin & date off flan, 10.62g, 29.00mm, (G&G # B241), about very fine.