![Silver tanka of Rukn Al-Din Barbak (864-879 AH / 1459-1474 AD), Dar al-Darb mint, Bengal Sultanate, India (B-536)](http://www.numismall.com/cdn/shop/products/v583_d2d1c072-c3ae-461c-8eea-dbde76a2e960_{width}x.jpg?v=1662477595)
Rukn al-dunya wa'l din abu'l muzaffar barbakshah al-sultan bin mahmud al-sultan / al muayyad bi-tayid al-rahman khalifat allah bi'l hujjat wa'l burhan, date below. 28mm, 10.8 grams .Dar al-Darb mint. Dated to 867 AH / 1462 AD. 28mm, 10.80 grams. "The coins of Indian Sultanates" #B-536.