Bengal Sultanate, Nasir Al-Din Mahmud Shah (AH 837-864, 1433/34-1459 AD), Silver Tanka, 10.64 gms, Arsah Chatgaon Mint, AH 862, Obv. Nasir al dunya wa’al dun Abu’al Mujahid mahmud shah al sultan, Rev. gwath al islam wa’al Muslimin khald allah mulkahu mint & date below, G&G #B446, about very fine, very rare.