Thanks for the response Professor Marvel. I have since learned that the XXV on the side of the frame is the Italian Date Code for 1969. I also found the following:
"In the late 60?s ? early 70?s IGI Italguns was an importer of Uberti and Armi Jager made single actions.
Trade labels were ?Nevada?, ?Kansas?, and ?American Pioneer?. Italguns may have been supplying several companies with these, including Liberty Arms and Pacific Imports.
The number of these models IGI italguns imported probably totals only in the low several hundreds.
Import years: 1969 ? 1971"
"The obvious presumption is that the revolvers are Italian, but there are no makers marks on them. On physical examination of the guns there is no mystery. The hammers on these single actions have a hammer block safety actuated by an internal rod. Aldo Uberti invented that, and used it on his companies single action replicas for several decades, starting in about 1969. So these guns are Uberti?s, and they would be among the companies first cartridge revolvers. "
"Whats the quality? They're all steel, not cheaply made at all. It's a very serious rendering of a single action replica. Metal fit is good, color case hardened finish is excellent. Cowboy shooters make complaints about certain generations of Uberti revolvers, particularly those with the D-cam hammer and its bolt. And this revolver has got that. But when in time, the revolver functions well. And if its not in time.... fix it so it is. Typical chicken soup for the single action guy's soul, eh?"
So it turns out to be a very early Uberti made in 1969, that shoots great, looks great and has really nice stag grips.