This is a vintage brilhart streamline tonalin alto saxophone mouthpiece. It's famously played by the great charlie parker.
This one is in ok condition. There has been a pretty bad tooth gouge and it's filled with a material of a different color.
It should be a very easy fix with one layer black acrylic, or you can keep the teeth cushion on. It doesn't affect playing either way. The item "Brilhart Streamline Tonalin Alto saxophone mouthpiece 3 charlie parker" is in sale since Friday, September 6, 2019. This item is in the category "Musical Instruments & Gear\Wind & Woodwind\Parts & Accessories\Mouthpieces".The seller is "haoywan-30" and is located in Great Barrington, Massachusetts. This item can be shipped worldwide.