Ok, let's try to explain the some things.

The frame appears to be from a 1987 Bianchi Limited, which was mid-range model. The tubing is Bianchi's proprietary Formula II, which is a double butted tubeset that we suspect was based on Columbus Cromor, which in turn was a well respected, mid-range tubeset.

The bicycle was repainted and decaled in the livery used by the Bianchi team bicycles in the late 1990s. Pantini was Bianchi's star rider during this period and he won the Giro d'Italia and Tour de France in 1998 for Bianchi.

The bicycle is updated with newer components but not all of them all are new. When a bicycle is assembled from a mix of parts, either different brands, models and/or eras, it is called after frankenbike, after Frankenstein's monster, which was assembled using parts from diferent human beings.

Being assembled in Italy, it uses Italian threading for attaching parts to the frame. There are three common bicycle threading standards. French threading is a metric standard. English threading is an imperial standard. Italian theading, for some unknown reason uses threading which has both metric and imperial dimensions, which is poor engineering.

I trust this clears up most issues. If not, just let us know and we'll enlighten you.