This is a Vincent Bach Corp. 24AW tuba mouthpiece. It's an older model, stamped with "corp." I've been collecting it because it's valuable, but I'm selling it since I don't use it. It shows considerable wear, and there's a dent on the shank. The specifications are quoted from the following site, please refer to them: ■ Tuba Mouthpiece ■ 24AW ■ Cup Depth: Deep ■ Rim Diameter: 31.25mm ■ Throat: 8.33mm ■ Price: 16,400 yen