I have contacted Cinelli now by email. Hope I get an answer soon.
If it isn`t too expensive I will probably let them repaint it. This way they can put the correct decals at the same time.
I just hope the frame doesn`t look too good afterwards cause if so I know I will have problems to let it go

From what I have found on the Internet you are right that Cinelli sold it to the Columbus family in 84.
Citoyen du monde, where did you get the information that Cinelli changed hadns in 78?