This is a cornet made by C.G. Conn, a major American musical instrument manufacturer. The New Wonder series, primarily saxophones and cornets, became popular among many players, both professional and amateur. During this period, Conn was known as the world's largest brass instrument manufacturer, and it contributed significantly to the development of jazz and classical music while continuing to innovate in design and manufacturing technology. This is a cornet that was also used by Bix Beiderbecke, a legendary cornet virtuoso, and it's an instrument with a new system that was all the rage at the time. This particular instrument is very rare, featuring a C/Bb rotary valve. When used as a C or A instrument, the main tuning slide is pulled out about 10 cm, and when used as a Bb instrument, it's almost fully inserted, with the tuning slide on the bell side adjusted. It has a quick-change system that is very convenient for orchestras, and it can also be used as an A instrument by extending the main tuning slide in the Bb position. It has a luxurious build, including beautiful engraving and a gold-plated bell interior. The airtightness is excellent. It's in miraculous condition for an instrument of this age. Approximately 90% of the surface plating remains. This instrument has had very few repairs, with a protective patch on the second valve slide. It has been thoroughly repaired and is in perfect working order. We have taken as many photos as possible, so please take a close look. Modern mouthpieces such as Denis Wick and Bach can be used. Please note that it is not a trumpet shank. Although it is over 100 years old, the intonation and tone are superb, and it is an instrument that offers a warmth different from modern instruments. It was very useful for "The Soldier's Tale" and orchestral transpositions, but I am selling it due to financial difficulties. It is a museum-quality masterpiece. Please make your purchase based on your own judgment, as it is an old instrument. We will do our best to provide additional photos, etc., to avoid any problems. Please feel free to ask any questions. This opportunity is unlikely to come again. Mouthpiece included.