Watch List notes:

ISLAMIC, Seljuks. Rum. Rukn al-Din Mas'ud I, AH 510-551 / AD 1116-1156. Fals (Bronze, 23 mm, 4.15 g, 10 h). Half-length facing bust of a Byzantine emperor, wearing loros, holding labarum and globus cruciger. Rev. Name and titles of Ghiyath al-Din Kay Khusraw I in four lines. Album 1203. Broome 1B. Extremely rare. Very fine.