Keilwerth (Couesnon) Alto Saxophone Monopole 1 ・Overhauled at a saxophone repair workshop specializing in saxophones in Tokyo, and kept with all keys sealed. It is possible to play across the entire range without any issues. ・This is a rare model with a high F# key. Judging from the distinctive key guards of Low B♭ and B, it appears to be the same era and model as the one used by Marcel Mule, a master of classical saxophone. ・There is a notch in the neck to avoid covering the high F# tone hole (this is not damage). See image 10. ・One screw is missing from the Low B and C key guards. See images 11 and 12. ・There are marks where the previous owner removed an added strap ring. See image 13. ・Due to the age of the instrument, there are missing parts and paint peeling. While I believe this model has a unique tone and the best operability for a saxophone of its time, I am looking for someone who understands this is more of a collector's item to experience a saxophone from that era. Below is information about the relationship between Keilwerth and Marcel Mule. Marcel Mule, the father of the modern saxophone, had a deep relationship with Keilwerth, and he served as a dedicated tester and instrument development advisor for the company for a time. ・Involvement in instrument development Leading development: Mule collaborated with Keilwerth from around 1928 to 1948. He requested the manufacturer to design a model "that he could play" and had them fundamentally review the manufacturing program. Birth of the Monopole: The "Monopole" series was born as a high-quality, professional model during this collaboration. ・Period of use Mule used Keilwerth as his main instrument from the 1930s to the late 1940s, and it is believed that many of his recordings from that time were played on this instrument. ・Existence of personal collection A Keilwerth saxophone from around 1935, personally owned by Mule, still exists, and there is a video of Nicolas Prost playing it. This product is a used item, so please refrain from purchasing if you are sensitive to such things. Please purchase only if you can adhere to the no-claims, no-returns policy. The instrument will be shipped in a case, but it is for transportation purposes only. Please consider it as an extra. We will pack it carefully for shipping.