SELJUQS of RUM, Kay Khusru II ibn Kay Kobad (634-643). AR Dirhem (2.96 gm; 22 mm). Siwas, year 643. Obverse, lion and sun, title of the ruler on the top as leader of Muslim faith, reverse, name of the king and title, mint Siwas, year, 643. Choice Superb EF. Lightly toned.