The facing is original and the tip opening measures. The mouthpiece is marked 5ML-E, followed by what I believe is the serial number on the next line. This mouthpiece was owned by the renowned Joe Viola, the great saxophonist and pedagogue associated with Berklee College of Music in Boston, MA. The item "Charles Bay Alto Saxophone Mouthpiece, Owned by Joe Viola" is in sale since Wednesday, April 1, 2020. This item is in the category "Musical Instruments & Gear\Wind & Woodwind\Parts & Accessories\Mouthpieces".The seller is "dc_sax" and is located in Alexandria, Virginia. This item can be shipped worldwide.