Zaydî Imams
al-Mahdî Ahmad ibn al-Husayn, 646-655 H./1248-1257 AD Mahdawî dirham 650 H., San'â al-Yaman. Lowick 1983 no. 20. 1.90 g.; Rare Extremely fine
Lowick has argued convincingly that the addition of al-Yaman to the mint name in this year does not simply mean "San'â in the Yaman" but rather San'â, the capital of the Yaman. The possession of the old capital was a matter prestige rather than a matter of economic importance.