This is a Vincent Bach mouthpiece, model "15." For detailed specifications, please refer to the following website of Nonaka Boeki (importer): ↓ Bach: Silver-plated (SP) Suggested Retail Price: ¥12,100 https://www.nonaka.com/bach/instruments/accessory/mouthpiece.html While there are minor scratches and some cloudiness on the surface, it retains its shine and surface condition as shown in the photos, and there are no major scratches or distortions. I no longer use it because I switched to a European-style instrument. I have an attachment to it, so rather than letting it sit unused, I'd like someone who needs it to use it and let it shine. That's why I'm listing it here.