This is the top of the line True Tone Alto Sax. Full roller keys & front Hi F. The most in demand. Buescher was the top producer of US made Saxophone from 1920's until 1950's. They made Saxophones for many  well known Companies including Selmer. Selmer bought the Buescher Company in the early 1960' and became the giant we know today. After buying Buescher they continued making Buescher as a second line to their Selmers. But the very best Bueschers ever made were  from 1928 to the early 50's. There are many opinions on this so do your research and make your own opinion. I have sold over 100 Bueschers all over the World. Mostly from 1920 to 1930. They have a wonderful Classic sound that not many Saxophones, even close to this price range, can achieve. Check out youtube Buescher saxophone videos. For the serious player I would recommend a professional regulation after shipping. This can be done at most Music Stores.