Watch List notes:

Seljuqs of Rum. Kaykhusraw II Ghiyath al-Din. 634-644/1236-1245. AR dirham (21.9 mm, 2.75 g, 11 h). Sivas mint, dated A.H. 638. with the caliph al-Mustansir. Album 1216.1. Good VF, light rainbow toning.