Alas I don't find any serial number, but an italian friend told me that it's a Colnago Super Più. This bike has been produced during two years 1993 and 1994. The painting scheme of this bike was only released in 1994. So it's probably a Colnago Super Più 1994.(Columbus SL tubing)
If I believe the previous owner this bike has been stored a long time in a shop. He was mounted with a full shimano RX100 group ( 52/42 ... 7 speeds 13/23 changed by me to 52/38 13/25 : I live in a mountaignous region ). As far as I can know it's its first paint.
I've done 7000 kms with this bike which is still in the same great shape. I've just decided to upgrade it , but in fact I don't know if it's a good thing.
I've found a complete dura ace 7700 group with a T.A. specialités compact crankset and blue Ambrosio Balance wheelset.
The ride of this bike is curiously stiff compared to my Gios Torino , but sensations are good anyway , not too tiring on long distances and relatively easy for climbing, as a steel bike can be.It's a good touring bike very nice to see when you stop to admire landscape )
Thks a lot for your reply and, once again, apologies for my awful english