Bach cornet mouthpiece 10 1/2 C GP GP: 24-karat to pure gold plating. This was applied after the initial purchase, so it's not the original finish. 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 this. I am very sorry, but I am not accepting price negotiations, so please refrain from doing so. Thank you very much.