Mubarak Shah, Silver Tanka, 10.99g, struck in the name of Muhammad bin Firuz, AH 831, Arabic legend on both sides, Obv: “al-Sultan al-'Azam Abu al-Muhamid Muhammad Shah bin Firuz Shah Sultani”, Rev: “Fi Zaman al-Imam Amir al-Mumineen Khulidat Khilafatuhu”, date in numeral (G&G# D654). Very fine+, Very rare.