Watch List notes:

Almohades. Musa b. Muhammad (Ibn Mahfuz). 631-660/1234-1262. AR dirham (15 mm, 1.50 g). Without mint name and undated. Ruler entitles amir al-gharb, 'amir of the west', i.e., Algarve. Album I410 (RR). Very rare. Good very fine.

Album, p. 73, notes that a hoard of about 100-120 pieces was discovered in the late 1990s, but that it has since been dispersed making this issue "once again eagerly sought, but hard to locate."