Watch List notes:

ISLAMIC, Persia (Post-Mongol). Aq Qoyunlu. Ya'qub, AH 883-896 / AD 1478-1490. Tanka (Silver, 21 mm, 4.15 g, 12 h), light post-reform tanka, struck in mints in Mazandaran and Gilan, AH 891 = AD 1486. In upper field to left, countermark. Album 2523. Light areas of weakness, otherwise, good very fine.