Lemond Zurich 
Freewheelers Puzzler: The question is, which bicycle is featured on this issue [Summer '04, as pictured below]? It also started off as a full-color photograph of a real bicycle.
...And the answer is:
Colnago CF3
This is the Puzzler that was found on the back of the Summer '04 issue of the Rides Schedule:
But wait, there's more! You've probably noticed that the bicycles
featured on the front page of this [Summer '04] rides schedule look a little different
than they did in the spring issue. Well, you're right, they are. The one
from the spring issue started off as a full-color photo of a Lemond Zurich
bicycle.
Freewheelers Puzzler: The question is, which bicycle is featured on
this issue [Summer '04, as pictured below]? It also started off as a full-color photograph of a real
bicycle.
...And the answer is:
Lemond Zurich
Colnago CF3