This is a YAMAHA euphonium, model YEP-321S. Overall, there are noticeable scratches, dents, and plating wear. Please check the photos carefully (it does not affect the performance). I used this during my student days, but I am selling it now that I have become a working adult and no longer use it. There are no particular problems with the sound. There is no sticking in the tuning slides or pistons. I couldn't find any slide grease or piston oil, so I didn't grease it. I think it's best to apply lubricants before using it. Before listing, I had a light maintenance done at a musical instrument store, and they replaced the cork and piston felts, and polished it with a polisher. The smell of the polisher remains a little, but it should disappear over time. The case is also quite worn, but there are no problems with carrying it. The mouthpiece is almost new, and I will include an SL-51S. (I mainly played trombone, so I used a different mouthpiece.) I loved the very soft sound that is characteristic of a euphonium. How about it for practice or for a hobby?