This is an especially early vintage Brilhart hard rubber bari sax mouthpiece, serial number 523. It has the "Designed by Arnold Brilhart" logo stamped on the top with nearly all of its original gold lettering still intact. The piece is in excellent original physical condition. There is slight oxidation and some calcium deposit on the inside window. This is a great vintage bari piece with a smaller tip opening. The sound is a very dark old school character.