BACH 8 1/2 BW trombone mouthpiece, silver-plated, small shank. This is a valuable piece manufactured in the early Elkhart era (1960s), known as "no dot" because there is no dot after the CORP engraving. It is said to use parts from the Mount Vernon era. (I think 8 1/2 BW is also rare) There is some plating wear on the shank and rim. (Please check the images) How about it for alto trombone or jazz? - Brand: VINCENT BACH CORP - Model: 8 1/2 BW - Type: Trombone Mouthpiece