This is an old (maybe 1950s?) vintage hard rubber Berg Larsen mouthpiece for the tenor sax. The piece is stamped an 80/2 with offset M and measures just a hair over that at .082”. The facing is in excellent shape, with no discernible wear to the tip or rails. There’s likewise no major weak to the beak. The only real wear of note is some minor ligature scratching around the body. The hard rubber has oxidized on the shank, evidence of the quality hard rubber content. Comes with its original metal ligature.