"Sogdiana, Dircham. 11th-12th Century A.D Debased silver. ?Black Dirham? (26.5 mm, 2.26 g). With the Arabic legend ?Al Mahdi? behind the head. VF. Rare last issues of the series.

Coins of this type, which visually seem to be bronze, despite bearing an older legend Al Mahsi are known from the hoards of the 11th and 12th centuries and often referred to as ?Black Dirham?"