This is a vintage hard rubber Otto Link Slant Sig mouthpiece for the tenor sax. This piece, origionally stamped a 10*, has been worked on by Paul "Doc" Tenney, who stamped it a 9. It measures .115".
This piece is in outstanding physical condition. It has just a couple light scratches on one side of the piece from a past ligature, and no other wear of note. The bite plate looks great (currently under a guard), and Doc's work has left the tip and rails looking perfect