Bach Cornet Mouthpiece CORP. 10 1/2 C GP GP... 24-karat to pure gold plating, applied after manufacturing. There are many scratches and scuffs. I believe there are no issues with playing. Personally, I think I used it quite carefully. However, since it is a used item, I would like to sell it to someone who understands. I am very sorry, but... I am not accepting price negotiations, so please refrain from doing so. Thank you very much.