I think it's just a Caad3 from the early 90's. Not seen one in that paint job but it doesn't have the lugs on the head tube like the later Cadd5's do with their a-head stems.
Ah i got you now - i think most of the caad 2s and 3s had quills (this one is a caad 3). My brother has a casd4 (see below) that uses an ahead already
Edit
Ehm, there‘s a quill (and not an ahead) already mounted or am i missing something?
Edit: i.e. i have no choice (as i am not in a mood to replace the fork)