ISLAMIC, Seljuks. Rum. Rukn al-Din Mas'ud I, AH 510-551 / AD 1116-1156. Fals (Bronze, 18 mm, 2.86 g), struck by Fakhr al-Din Ahdabid acknowledging Mas'ud I, Seljuk of Rum, Dvin in Armenia, circa AH 539-547 = AD 1114-1153. A. Akopyan: Dvin in the eleventh and twelth centuries. City history in the light of new numismatic materials, pl. III, 19. Of the highest rarity and great interest. Struck somewhat off center and with minor deposits, otherwise, very fine.

We kindly thank A. Akopyan, who was the first one to identify and to publish this type, for his valuable contributions to the discussion of this issue