...the best Atala bikes from the 70's and 80's are pretty good frames. Even though that one is a little rough cosmetically, if I was looking for a project in my size, I'd be willing to spend a hunnert bucks on that one, a little more if those wheels are in decent shape. There's nothing wrong with that crank, except you need the Stronglight puller, and the chainwheels are a kind of obscure BCD.
The original derailleurs as listed in your catalog scan were nothing to write home about. So even if the replacements look a little out of place, they work better.
Even though the chrome looks rough, it might polish up OK with some elbow grease and rubbing compound. It's Columbus tubing, and probably the same frame as the Professional.