Just in case someone is even considering...

This is from Chas, the technical guru at the Gitane web site:

"Colnago Sport frames and complete bikes were 2nd tier models offered by Colnago. They may not have even been made by Colnago.

The forks have Columbus labels but the seatpost size is listed as 26mm
which might indicate it's made of lower grade tubing."

So, look, but don't leap.

(As I posted this, I felt duty-bound to add this coda...)

Cheers!