There are several signs of this being a really nice bike. First, it just looks good. It has lean, spare lines.
Second, it seems to be a Tomassini, not an unknown name, although the headbadge is not visible.
Third, the dropouts and the through-tube cable routing. The dropouts are forged and the top routing is a lot of extra work for the framebuilder.
I'm sure others here can give you more.
Ken Freeman Ann Arbor, MI USA
(also on BF)