Pete,
The link to your "documentation" indicates that your gun was sold by "Cherry's" firearms sales. Cherry's has a history of marketing guns that they have special ordered, in limited numbers, from various manufacturers that are only available through them. I would assume that your gun is one of them. That would make your San Juan Hill USFA a Cherry's limited edition and not, necessarily, a USFA limited edition.
As for collector value, the Uberti USFA's rank a distant second to the all US made models. A shame because, back in the day, those Italian USFA's were head and shoulders above their Uberti brothers, just not as well done as the later made all US guns.
So... if it was mine I would go ahead and "shoot the hell out of it" and any potential collector value (which I believe would be minimal) be damned!
CJF