Re:
Well, I've finaly got ansver for the most important of my questions about my Master.
It's for sure Colnago Master 1989. I have agreed with this, when I've found out, that in 1989 Colnago had sponsored Panasonic and Malvor Sidi Colnago teams both. And here we have those frames both. The only thing is that they have Colnago, not clubs engraved on the botom braket. Other Master frames had clubs that year.
As I've found out, Master Piu also apeared that year and there are some of them in the web in Malvor paint also with clubs. Some Piu's have "Master Pui" deacals, some have only "Master".... AND there is one I found with Colnago on the bottom, not clubs. So, concerning all this and that mess Colnago had with their frames marking, I think mine and Panasonic frames have same chances to be Piu and just Master.
If anybody got interested - take a look at the tubing decal. Mine and the one here are same and sort of unique. At least I didn't find more in the web.
Guys from Colnago didn't answer my letter with serial yet. I plan to write them more, when I get Italian translation of my questions. The next step - trip to Italy next Summer.