Nusrat Shah, Silver Tanka, 11.06g, AH 797, Arabic legend on both sides, Obv: “al Wathiq ba Tayeed al-Rahmani Nusrat Shah al Sultani Khulidat Mamalkatahu”, Rev: “Fi Zaman al Imam Amir al Mumineen Khulidat Khilafatahu", AH 797 in number”. Very fine for type, exceedingly rare. EX. Paul Stevens Collection. Nusrat Shah was a later ruler of the declining Tughlaq dynasty who emerged during the prolonged struggle for the Delhi Sultanate following the death of Firuz Shah Tughlaq. He established his authority at Firozabad and contested the throne with other rival Tughlaq princes. His reign coincided with a period of severe political fragmentation, when the once-powerful Sultanate was increasingly divided among competing factions and provincial governors.to this turbulent period, his coins particularly the present coin is only 2nd known example of silver tanks other than Goron & Goenka, and of considerable historical and numismatic importance, representing the final phase of Tughlaq monetary issues before the rise of the Sayyid dynasty.