Watch List notes:

Islamic Coins, Abbasid, al-Ma'mun, dinar, no mint, 209h, citing 'Ubayd Allah b. al-Sari, rev. small annulet beneath caliph's name, wt. 4.18gms. (Bernardi 97; W.389), some minor marks, very fine and scarce (200 - 250 GBP)