This is a great original Selmer Master Metal mouthpiece for the alto sax. It features the Selmer logo on the shank and a complete stamp on top of the piece. It measures .058", making it close to a Selmer B*.
The piece is in excellent physical condition, with no wear on the bite plate and just a small amount of finish wear on the table and baffle, as seen in the pictures. This is a great playing piece, or for the collector as well. This is one of the first metal mouthpiece made by Selmer.