This is a Yamaha full double horn. I couldn't find the model number on the instrument itself, but based on the wrap and color, it appears to be a YHR-665G. This was a professional model at the time, and Yamaha's first gold brass model. It has a short production run, making it a rare instrument. I purchased it used previously, and now that it has served its purpose, I am selling it. Both the rotary valves and the tuning slides are not stuck, and it is in a condition ready to play immediately. While it shows significant signs of use on the exterior, the tubing and interior are relatively clean. A mouthpiece is not included. Also, the case has a broken connection (see the last photo), so it is included only for packing purposes. No returns or exchanges accepted. Thank you for your understanding.