They've been modified. Those are Tomaselli adjustable clipons. I run them on my XS. Someone must have worn them out and couldn't get them to stay tight any longer so they welded them in place. So while it looks like you can still adjust the angle of the bars on one plane, somewhat parallel to the ground, you can't adjust them in the other direction to control the angle of the bars up and down.
Still better than having bars completely locked in place and for $40 shipped you can't go wrong. Those are $120 or so new.