Bengal Sultanate, Nasir ud-din Mahmud (AH 837-864, 1433/4-1459 AD), Gold Tanka, 10.76 gms, AH 841, Arsah Chatgaon Mint, Obv. Nasir al dunya wa’al din abu al Mujahid Mahmus Shah al Sultan, decorative borders around, Rev. al mu’ayyad bi-tayid al-rahman khilafat allah wa’al din, mint & date in margin, Unlisted in G&G, similar to #B407, extremely fine, exceedingly rare.