Perantucci Tuba Mouthpiece PT-20-S Silver Plated
 
These mouthpieces are all new old stock and also include the "Mr Tuba" stamped on the mouthpiece from the factory.
 
Perantussi say the following about this mouthpiece.
An excellent mouthpiece for Eb tubas, particularly when a full dark, orchestral sound is desired. Full sound over entire range.
 
Cup: 31.8mm diam.
Deep cup, strongly rounded at bottom
Rim: Width 8.2mm.
Inner and outer rim, well-rounded with contact point toward the perimeter 
Throat Bore: 7.8mm
Shank - Small - generally used on older instruments.
 
Please note - For mouthpieces purchased online I am not able to offer trials - if you are looking to try this mouthpiece, please contact Mr Tuba at sales@mrtuba.com
 
These mouthpieces are all new stock.  They may have the odd mark on the shank where they have been inserted into an instrument in-store and the box maybe a little tatty, but they are all new stock.
 
I find mouthpieces impossible to take photographs of due to the reflections, so the image shown in the stock image from Perantucci.  I am happy to supply additional images if you send me a message.