Qutub al din Mubarak Shah, Silver Square Tanka, 10.39g, "al- imam" type, Hadrat dar al Khilafa Mint, Arabic legend on both Sides, Obv: “al imam al a'zam khalifa rabb al alamin qutb al dunya wa l din abu l muzaffar mubarakshah”, Rev: “al sultan ibn al sultan al wathiq billah amir al mu minin”, Date and Mint name in outer margin (G&G# D247). About extremely fine, rare.