This is a vintage hard rubber Geo M Bundy mouthpiece for the alto sax. These pieces were made back before the Bundy name was associated with student level instruments, and is actually a fine hard rubber piece. It is stamped a 3 and measures .066”. The mouthpiece shows some very light ligature scratching on top and light oxidation for its age, but no major wear. Tip, rails, table, and beak all look great.