This is an extremely rare Dukoff hard rubber mouthpiece for the tenor sax. It has the vintage fluted chamber and is stamped a 5*, measuring .090".
This mouthpiece is in excellent physical condition. There are just some slight marks on the bite plate, but no major scratches or indentations. The tip and rails look simply outstanding. The sound of this mouthpiece is reminiscent of a Florida vintage Link, with a nice big warm sound and lots of projection.