In this case, it might be better to use "the Mahdi" as a title, rather than "al-Mahdi" as a proper name. In an eschatological sense, this is indeed the same "al-Mahdi' encountered by Gordon in the Sudan seven centuries later. The founder of the Almohad (Muwahhid) dynasty, Muhammad ibn Tumart (d. 1130), a Berber religious reformer, proclaimed himself "the Mahdi", the prophesied redeemer of Islam who would rid the world of evil in preparation for the Day of Judgement. These anonymous coins citing the Mahdi as "our imam" were struck by successors of Ibn Tumart (and others) at a number of mints in Spain and North Africa from c. 1160 until perhaps as late as the middle of the 14th century.
Hello all. This is a late reply but as this post came up near top in a websearch will forward a couple of useful links with regards as reference. They are still piecing together the history behind the minting of these coins : http://www.numismaticamedieval.com/2015/01/el-dirham-almohade.html http://www.numismaticamedieval.com/p/el-dirham-almohade.html Regards.
Did anyone say Almohad? Did anyone say Muslim Spain? Hisham II Caliphate of Cordoba AR Dirham And did anyone say Umayyad? And no one said Abbasid, but here is one too!