Nine silver dirhams, struck in different cities across various years during the reign of al-Ma'mun. A silver dirham, Madinat Isbahan mint, dated 198AH/ 813AD, 2.7g, 22mm. A silver dirham, Madinat Isbahan mint, dated 199AH/ 814AD, 2.9g, 22mm. A silver dirham, Madinat Isbahan mint, dated 200AH/ 815AD, 2.8g, 24mm. A silver dirham, Madinat Isbahan mint, dated 201AH/ 816AD, 2.7g, 22mm. A silver dirham, Madinat Isbahan mint, dated 202AH/ 817AD, 2.8g, 24mm. A silver dirham, Madinat al-Salam mint, dated 203AH/ 818AD, 2.8g, 22mm. A silver dirham, (double margins)Madinat al-Salam mint, dated 204AH/ 819AD, 2.8g, 23mm. A silver dirham, Madinat Isbahan mint, dated 205AH/ 820AD, 2.7g, 23mm. A silver dirham, Madinat Isbahan mint, dated 207AH/ 822AD, 2.6g, 23mm