Time of Constantine IX, circa 1042-1055. Anonymous AE follis , Constantinopolis.
Obv: Christ seated facing on square-backed throne.
Rev: IS XS / bASILE / bASIL' in three lines; above, cross between two lines; below, crescent between two lines.
DOC Class D. SB 1836
Weight: 9.17 g.
Diameter: 26 mm.