This is a Yamaha Euphonium YEP321S. It's an old instrument, but I've taken really good care of it. While there are some dents and scratches commensurate with age, I believe it's in pretty good condition. (The exterior of the case has scratches and dirt.) The pistons and slides are not stuck, and there is almost no plating剥がれ. I have cleaned the inside of the tubes myself. I will include a YAMAHA 48 mouthpiece, and a protective cover for the area under the mouthpiece and the hand rest (this is more of a bonus). This instrument holds many memories, but I no longer have the opportunity to play it, so I'm offering it for sale to someone who will cherish it. Please note that due to work commitments, it may take some time for me to respond to messages and ship the item.