This is a vintage Florida Otto Link Super Tone Master Tenor Saxophone Mouthpiece. It does not have the "USA" stamp. Originally 7* but opened at one time to .110 by Adam Niewood. A previous owner claims he had it brought back down to .105 by Matt Marantz. There is some plating wear due to the work that has been done. It is in excellent playing condition and is a great playing mouthpiece.