This is a YAMAHA professional model trumpet, the YTR-634. It's a so-called Nini Rosso model, with an ML bore and a late-model integrated valve casing. The sound production was consistent from the low to high registers. Regarding the condition, aside from minor dings on the bell as shown in image 4 and other minor scratches due to age, there's hardly any damage, and it's in very good condition for its age. There's little lacquer deterioration except inside the bell and near the mouthpiece receiver, showcasing Yamaha's high level of craftsmanship. The pistons and slides function without any problems. The case is from a slightly later Yamaha professional model. It will be included as is. Added 10/14: The bonus mouthpiece will be changed to a YAMAHA 11.