ISLAMIC. Seljuks. Rum. Rukn al-Din Mas'ud I (AH 510-551 / 1116-1156). Fals. Obv: Half-length facing bust, and holding labarum and globus cruciger. Rev: Legend in four lines. Album 1203; Broome 1B. Weight : 3.93 gr Diameter : 21.69 mm