This is a vintage metal Otto Link Tone Master mouthpiece for the tenor sax, serial number 1R81. This piece dates back to the NY days and is in great shape. It is table stamped a 5* and has been professionally "trued up" a bit to .090", with a nice even break at 50. The work is exceptional. The piece shows a fair amount of finish wear for its age but is in phenomenal physical condition. The bite plate is in good shape and the rails are even.