SELJUQ OF RUM: Kayqubad I, 1219-1236, AR dirham (2.58g), Sivas, AH624, A-1211, caliph al-Zahir, VF. The caliph al-Zahir was appointed in Ramadan 622 and was succeeded by al-Mustansir in Rajab 623, more than five months before the end of 623. The caliph's name and the date are on the same side of the coin, the date in words.
Estimate: 100-140 USD