Watch List notes:

IDRISID?: Muhammad b. Ahmad, ca. 900, AR dirham (1.57g), NM, ND, A--, unknown ruler, unpublished in any source, Fine, RRR. Muhammad b. Ahmad was either one of the very last Idrisid local rulers or some undetermined contemporary rival. A very different type, also in the name of Muhammad b. Ahmad, appeared in the Marti Hervera / Soler & Llach Auction 1092, Lot 220, but is of an altogether different style, perhaps of a later ruler who also bore the common name Muhammad b. Ahmad. Further research is needed.

Estimate: 300-400 GBP