Watch List notes:

QASIMID (ZAYDI IMAMS): al-Mahdi Ahmad, 1676-1681, AV harf (0.50g), [San'a], AH1090, A-A1133, citing the ruler as al-mahdi ahmad bin al-hasan, extremely rare type, so far reported only for AH1087 and 1091, EF, RRR. Third reported example; the only two are on Zeno, dated 1087 and presumably 1091 (image of the 1091 not preserved).

Estimate: 400-500 USD