Hi Collin
Despite the 600 parts - you should have bought it. Given state and price are right of course. One of my own Prestos, also a 'Model Campagnolo', came with a little Huret, Sugino, a few bits Shimano ...and yes, a couple Campag parts too. I do not know why this was the case. Maybe some parts had been replaced, but it could also be the 1st owner couldn't dig deeper in his pocket after he had his frame built. Of course the bike will be fully resurrected with Campag.
The in this topic covered green Presto does not have the 'three X' cutouts under the bb shell. Maybe that was only for frames where cables ran on top bb.