Watch List notes:

YEMEN, North. Zaydi Imams (Qasimid). al-Mahdi al-'Abbas, AH 1160-1189 / AD 1747-1775. Double Kabir (Silver, 20 mm, 2.71 g, 12 h), San'a', AH 1169 = AD 1755/6. Album T1145. Zeno-138732. Very rare. About very fine.