This is a Yamaha cornet, model YCR-2311. The mouthpiece is a Yamaha 9E. The pistons and slides move smoothly. As shown in the photos, there is rust and the stopper screw for the 3rd slide is missing. I didn't notice anything particularly concerning when I test-played it. The case has marks where writing has been erased, etc. There is no damage to the hardware. I will wrap the case in bubble wrap and ship it.