This is a good Florida vintage metal Otto Link Super Tone Master tenor sax mouthpiece, serial number G4. This piece is a quality early Florida piece, without “USA” on the shank. It is stamped a 6*, "trued-up” by Marin Spivack
a few years ago, and it measures how a 6* should at .095”. The piece shows finish wear for its age but no physical wear such as cracks or nicks. A very nice player.