Abbasid Caliphate | al-Mahdi | AR Dirham | 778 CE / 162 AH | Madinat al-Salam

 Struck at Madinat al-Salam (Baghdad, Iraq) | AH 207–208 (c. 822–824 CE)** Up for sale is a beautifully preserved, genuine silver dirham from the Islamic Golden Age. This coin was struck under the famous Abbasid Caliph Al-Ma'mun, the great patron of the House of Wisdom in Baghdad.

Historical Context & Design This piece represents Al-Ma'mun’s landmark monetary reform type. It features the distinctive double obverse margins introduced in AH 206, which added the secondary prophetic verse from the Qur'an (Surah Ar-Rum). The epigraphy is rendered in sharp, classic early Kufic script.

Weight:** 2.91 grams * **Diameter:** 23 mm 

Mint:** Madinat al-Salam (مدينة السلام - "City of Peace", Baghdad)

*Obverse Field:** Three lines of the Kalima ("There is no god but Allah alone; He has no partner"). 

Reverse Field:** Prophetic mission statement with the Lillah honorific ("To Allah. Muhammad is the Messenger of Allah"), complete with a control/workshop mark below the central legend.