Found this Billon Tanka coin of the Jaunpur Sultanate, weighing more than 10 grams, I'm guessing it was struck in the name of sultan Hussain Shah, but it's having the year AH 779, which is mysterious, not any 779 dated Billon Tanka struck in the name of any Jaunpur sultan. Can you please help me out. Thank you so so much for going through this specimen :)


