Watch List notes:

GREAT MONGOLS: Anonymous, ca. 640s-650s AH, AR dirham (3.11g), NM, ND, A-1978K, obverse in Persian, be-qovvat-e aferidegar-e `alam, 'by the power of the Creator of the world', and posthumously citing the caliph al-Mustansir (AH623-640) on the reverse, different calligraphic style, thus likely struck at a different mint than the usual examples, choice EF, RR.

Estimate: 140-180 USD