ISLAMIC, Persia (Post-Mongol). Aq Qoyunlu. Rustam, AH 897-902 / AD 1492-1497. Ashrafi (Gold, 16 mm, 3.29 g, 4 h), Kashan (?), undated. Rev. Within a lozenge incuse, ‘ʿadl / sulṭān Rustam / Kāshān’ (‘Justice. Sultan Rustam. Kashan’ in Arabic), countermarked on a Burji Mamluk ashrafi of Qaʾitbay (AH 873-901 / AD 1468-1496). Album 1027 (for host coin) and 2531A (for countermark). Extremely rare and with a particularly sharp countermark. Traces of mounting and with a scrape on the obverse, otherwise, very fine.