I have lucked into a very clean, Uberti 1866 Yellowboy I paid next to nothing for it and after a lot of research I've discovered this:
It is a Very early import, serial number 43x it is marked "Westerner Arms"
which I am assuming is the precurser to "Western arms" Santa Fe NM. It is the 19" round barrel carbine model. It is in 90% shape and with a little cleaning it should come up to 95% or better.
it is not marked with any other model information.
I haven't been able to date it from the serial #, but I believe it is around 1966vintage. It came with the post modern vinyl gun case.
If anyone can add any information I would greatly appreciate it. Estimates on value or even educated guesses would also help me out. I can find virtually no information on these .22 models apparently they didn't make a whole lot of them. It is very smooth and function is great. Thanks for any and all help.