This is a very rare early Florida vintage Otto Link Super Tone Master Tenor mouthpiece, serial number G80. This mouthpiece is kind of a hybrid of the New York and Florida model STMs. It has many of the features of the New York models, such as the long bite plate, and the facing stamp on the table. The piece also features the double line around the shank. The piece was evened out at somepoint, but still maintains it's orignal 7 facing measuring out to .098" The mouthpiece has a big, dark sound and can take as much air as you can put into it.