Own a piece of saxophone history that also plays great. This is a rare, very early Hard Rubber ‘Designed By Arnold Brilhart alto mouthpiece with a three digit serial #464! It has curved sidewalls, a medium round chamber, and a slight roll over baffle. Tip opening measures 0.072″, and the facing looks original, with a ‘creamy’ matte table, tip and rails. Beautiful, medium-dark tone. Earliest Brilhart serial that I have seen.