Firuz Shah Tughluq, 10.21g, Silver Tanka, AH 786 (date not listed in G&G), Obv: Arabic legend Naib Amir al-Mumineen 786, Rev: Arabic legend Firuz Shah Sultani. Extremely fine, extremely rare. Similar to the gold Tanka listed as G&G D466, but this silver Tanka is much rarer. Additionally, it bears the AH date corresponding to the Islamic holy number 786.