Watch List notes:

RASULID: al-Mansur 'Umar I, 1229-1249, AR dirham (1.95g), San'a, AH637, A-1100.3, type C (diamond with excurvate sides), mint & date fully legible, almost no weakness, very rare mint for this type, EF, RRR.

Estimate: 150-200 USD