Bengal Sultanate, Silver Tanka, 10.58gm, Ghiyath Al-Din A'zam (Coin issued during the reign of his father) (AH 792-813 / AD 1389-1410), AH 790, 'Arsah Satgaon Mint. Obv: al-mu'ayyad bi-ta'yid al-rahman ghiyath al-dunya wa'l din abu muzaffar a'zam shah al-sultan, with four caliph's name in margin, Rev: nasir al-islam wa'l muslimin yamin amir al-mu'minin. G&G B229 type. Very Fine, Very Scarce. View Lot Details