Attribution Of A Mongol Dirham

The "Mongol Empire" of Genghis Khan and his successors did not have a unified currency system; the Mongols were not a coin-using society and simply kept issuing whatever styles of coinages happened to be already circulating in the areas they conquered; cash coins and paper money in China, Arabic-language dirhams in Iran, and so forth. Their own titles would appear on the coins, of course, and occasionally, one of their own Mongolian languages, which looks close enough to Arabic to be easily confused with it.

Now to the identity of your coin. I wish I could report it was from one of the famous world-graspers, but alas it is not; I believe it is from the Ilkhanid ruler, Arghun. This coin is a close match on zeno.ru, but I'm having a terrible time spotting either the date or mint-name on any of these Uighur-language Ilkhanid coins.