Here's a nice late 20's or 30's vintage Frank L Kaspar Chicago mouthpiece for the alto sax. This is a quality hard rubber mouthpiece. It is stamped simply “16” on one side of the table and the original tip opening measures .062”, slim as was the style in its day. The mouthpiece looks fantastic and is in great shape, no cracks, nicks, or major scratches anywhere. The original tip and rails are still in pristine shape, and there are no teeth grooves on the beak. This piece has little baffle, a larger round chamber, and makes for a great classical piece if you want something with a “round” tone.