Your sax is from 1914-16 era, probably silver plated. If the parts are missing things will be difficult at best. A complete rebuild without missing parts is at least $450 and up plus the parts replacement and you still have a old sax that has intonation problems among other things. I know as I have a Conn tenor 3337X of the same period that I have played for the past 55 years. At the time I got it my family was poor and that was the best we could do. For what you are going to pay to repair the sax, you could add some more $ and get her a more modern, used sax. The old horns just handicap you too much. My grandson wanted to play my old tenor (he loves the nickle plated look it has) but his sax teacher told he and his mother to get a newer sax as he would be handicapped. So he now has a Yamaha YT23. Be advised!!!! Tom