ISLAMIC, Mongols. Great Khans. Möngke Khan ruling. Mas'ud al-Khwarizmi, governor of Karakorum, AH 638-667 / AD 1240-1269. Broad Fals (Bronze, 28,6 mm, 3,35 g), struck under Mas'ud al-Khwarizmi, governor of Karakorum, Kashghar, AH 650 (frozen date) = AD 1252/3. Album 1975. Common crude Struck for this issue. Rare. VF+