Watch List notes:

Abbasid, al-Mahdi (158-169h), fals, Nasaf 159h, obv., in margin: mint and date; in field: horse walking left, uncertain symbol above, rev., in margin: mimma amr bihi al-'a...Allah...al-Mahdi; in field: Muhammad | rasul Allah, 2.50g (Nastich p.26, fig 23, this piece), grey-green patination, about very fine and extremely rare (£700-1000)