B&S, Guardala and Huller
I'm borrowing my uncle's sax, a 'Trafford' tenor, built by B&S in 1980, and it came with this mouthpiece. It is an ebonite piece, and the only engraving I can find on it is the number 3. As you can see, the lig and cap are Selmer, but they seem a bit small for the MP. I've seen similar unbranded...