India, SULTANS OF BENGAL, Ghiyath al-din Bahadur, silver Tanka, Shahr Laknauti 723h (GG B109; ICV 2629); Nasir al-din Nusrat, silver Tanka, Dar al-Darb Husainabad 925h (GG B820; ICV 2671); Ghiyath al-din Mahmud, silver Tanka, no mint, 933h (GG B919; ICV 2676) [3]. Very fine or better, first rare £100-150