Islamic Seljuq Rum Sultanate 1 Dirham AH643-647(1246–1262). Kayka'us II (1246–1262). Obverse center:There is no god except Allah; Muhammad is the messenger of Allah; the Imam; Al-Musta'sim Bi'llah (the Abbasid caliph); Commander of the Faithful. Obverse margin: year seven forty and six hundred (647). Reverse center: the great sultan; Allah's shadow in the world; the glory of the worldly life and religion; Kayka'us Ibn Kaykhusraw. Silver. NGC MS 61