Thank you for viewing. Meyer Alto Saxophone Mouthpiece, size 5. This is a 100th Anniversary Hard Rubber New York model. The chamber is marked "M," but according to the manufacturer, it's the original chamber. The baffle has been slightly modified compared to current models, and it appears to use a unique mold. Includes a dedicated ligature & cap (nearly unused). A serial number is stamped on the body side. As you can see in the photos, there are some scratches on the top from the ligature. I felt that this mouthpiece sounds much better than the standard model. Thank you for your consideration. Please read the profile section before purchasing.