Watch List notes:

ISLAMIC, Mongols. Great Khans. temp. Möngke. AH 649-658 / AD 1251-1260. Æ Fals (30mm, 4.12 g, 6h). Issued by Mas'ud al-Khwarizmi, governor of Karakorum. Kashgar mint. [Dated AH 650 (AD 1252/3)]. Cf. Nyamaa 32; Album 1975; cf. ICV 1958; CNG 78, lot 1950. Brown patina, green deposits. Fine.