Uberti Research Project

[Long Johns Wolf]

Howdy to the campfire.
I am working on a research project. It's on the Uberti company.
One chapter will be dealing with the question when a few of their key guns were produced for the first time or first launched in the USA.
The question here is when did Uberti start making their version of the Sharps 1874? Their first caliber was probably .45-70  but correct me if I am wrong?
Thanks for your help.
Long Johns Wolf