VT stands for Val Trompia, a gun making region of Italy. About a 50 mile long valley in Brescia, that had water and iron available, and has been an armory stretching back to the early Middle Ages.

Finito tells you the gun was proofed in a finished state. PSF with single crown is standard smokeless powder proof. Two stars would be superior proof, usually a 3” chamber gun.
Best,
Ted