Al-Sultan ibn al-Sultan rukn al-dunya wa'l din abu'l mujjahid barbakshah / Shahada, mint (Nasirabad) and date (864). 29mm, 10.8 grams. Nasirabad mint. Dated to 864 AH / 1459. Nice large silver coin. Extremely rare type - of highest rarity (RRR)! "The coins of Indian Sultanates" #B-521.