This is a Yamaha euphonium. YEP-321 This is a common model often found as equipment in school bands, etc. There is lacquer wear, rust, and minor scratches. The slides are not stuck, but one of the pistons is not working properly and needs repair. There are four pistons. I am not an expert on these instruments, so please refer to the photos for details. Please consider this a junk item. I will cover the shipping costs. Thank you very much.