Watch List notes:

ABBASID: al-Amin, 809-813, AR dirham (2.87g), Madinat al-Salam, AH198, A-221.1b, Lowick-1409, rabbi Allah above, and the caliph's name al-amin below the reverse field, with 3 pellets beneath his name, slightly wavy surfaces, VF, RRR. The last issue of al-Amin, struck at Baghdad just months before the city was taken by al-Ma'mun and al-Amin killed. There are no other types or mints in the name of al-Amin dated AH198. An extremely rare variety, none has appeared on CoinArchives.

Estimate: 400-500 USD