Originally Posted by
big chainring
Things to look for and that are present on the purple bike you are looking at. It has Campy dropouts, and they are the old style, 1970's. Hard to see but the way the stay and fork ends are finished is different from bike to bike. It has a chrome fork crown and it looks like a nice one. Curve of the fork. Italians seem to get a graceful curve. Clearance at the seat stay bridge and fork. On the bike i question it looks like larger clearance as what you would find on a 70's bike. Hard to see the lugs. Seat cluster and how that is finished.
That's the stuff I look at.
The bike you linked to is a real nice looking bike and well equipped.
I stated 60's due to the Sport derailleur spring hole in the drive side dropout.
The 151 mm BCD crank also points to the 60's.
It might have a top tube surprise, an abandoned rerouting of a possible internal brake cable routing to three brazed on guides