SAFFARID: Ya'qub b. al-Layth, 861-879, AR dirham (2.82g), "Madinat al-Salam", blundered date, A-1401.2, imitative issue with the mint name of Madinat al-Salam and blundered date, likely struck by supporters of his failed attempt to conquer Baghdad, where he was defeated at Dayr al-'Aqul southeast of Baghdad in Rajab 262, obviously not an official issue as he never controlled Baghdad, VF, RRR.
Estimate: 160-200 USD