I guess that I'll have to do some more cleaning to see if I can read the model no. better. Then does the serial no. have any relevance? Thank you for the information. Looking at the limited information that I do have I am tending to believe that it is a later piece due to the fact that it has the button inside the trigger guard that converts it from a repeater to a single action. Any other information would be greatly appreciated also, such as books that I could try to find at a library maybe.