Alexius I Comnenus, AE, Tetarteron (24mm, 7.55 g) Constantinople. 1081-1118 AD. Obv: IC-XC to left and right of bust of Christ facing, cross behind head, holding gospels and raising right hand. C at upper left and right.
Rev: Cross with globe and two dots at each end of the arms, X in centre, large crescent below, around the cross are four more globes surrounded by small dots.