Rukn al din Firuz, Silver Tanka, 10.94g, Delhi Mint, Obv: Arabic legend “al-Sultan al-‘Azam Shams al-Dunya wa al-Din al-Sultan al-Mu’azzam Rukn al-Dunya wa al-Din Firuz Shah bin sultan” in rectangle, Rev: Shahada & Arabic legend “Fi Ahd al-Imam al-Mustansir Amir al-Mumineen”. In margin “Koranic” legend (G&G# D92). Extremely fine for type, very rare.