Bengal Sultanate, Ghiyath ud-din Iwad, Second Series, (AH 622, 1225 AD), Struck in the name od Iltutmish, Silver Tanka, 10.27 gms, AH 622, Obv. Al sultan al-muazzam shams al duniya wa’al din abu’al Muzaffar Iltutmish al-sultan yamin al khilfat allah nasir amir al mu-minin, Rev. kalima shahada with caliph nasir, with clear margin around, G&G #B39, very fine, very rare.