I have both of the Uberti made Infantry Rifles (as Oliver Winchester marketed what we call muskets). My !866 is marked CU (2019). I special ordered two of them through Cimarron. They placed my order with Uberti, and their response was they had just enough of the parts for two, and would not be making more. So my best friend Johnson Barr and I have them. My 1873 was a GunBroker find at a crazy low price. I guess they are not popular. It is marked BN (2000). I do not know how many years Uberti produced them.