Rasulids
al-Muzzafar Shams ad-dîn Yûsuf ibn 'Umar, 647-694 H./1249-1295 AD Dirham 660 H., San'â. Unusual type with the name of the caliph al-Musta'sim in the obv. centre above the king's name which is continued in the margin between 6 and 12 o'clock to the right side and mint/date-formula to the left side. 1.91 g.; Scarce mint and rare type Extremely fine