The body is yellow brass, and the bell is gold brass. There are dents from use (photos ⑧⑨, etc.), rust due to lacquer peeling (photos ⑪⑫⑬), and scratches. I used it normally, so there is no sticking of the rotary valves. Please check the condition in the photos. If you have any questions, please feel free to comment. I hope you will take good care of it. Thank you for looking.