I appreacate the response. Attached is some info that I collected from research.
Manufacturered by a large family of Gittis that worked in the Val Tropia region which lies north of Venice. They still work in large cooperatives with some family specializing in barrels while others would do the stock and others the locks. Most of them now sub contract to Beretta.
Giuseppe Gitti, Gardone VT: One of the many (over 300) Registered Gunmakers or families of the town of Gardone Val Trompia ( G in the Trompia Valley) up the creek from Brescia, the Centre of Italian Gunmaking since the mid or early 1500s, and iron making since Roman times.
A lot of shotguns were made in small, individual lots, by families working together, each supplier contributing various parts, etc to be assembled into a complete Gun. The Final "maker" usually placed their name on the gun; Very few families made a gun from all the raw materials right through to the finished article, but of course the bigger "industrial" makers do so.( Beretta, Bettinsoli, Pedrazzi etc, etc).
These "family" or "artisan" makes supplied the general Italian shotgun market for over a century, and they were also exported by "co-operatives" specifically formed to market the guns out of Italy.
Date of manufacture of early Italian made shotguns can be determine by proof marks, see attached link.
http://www.shotguns.se/html/italy.html
By the way, I saw the exact gun listed for $3500 US and later listed as sold.
Again, I appreciate the comments.