This is nice S80 C* mouthpiece for alto sax made by Selmer Paris. The mouthpiece has been used in the past but is in stellar physical condition around the body and the facing profile. Its table, tip and side rails are all excellent. The inner chamber of these pieces feature a square shaping at their throat and straight slanted side walls. They take the air in very efficiently and has a very direct focused response.
The C* is the go to for many of the worlds finest classical saxophonist and is a teacher favorite as well. Get one used at a great price