Perantucci Tuba Mouthpiece PT-89 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.
Model PT-89 works well on medium-large and large-bore tubas. High resistance offers a good combination of easy, secure response and round, resonant tone.

Small and secure. Recommended for young players

Cup Diameter: 32.00 mm, bowl-shaped, shallow cup
Rim: 8.50 mm, rounded inner and outer edges
Throat bore: 8.35 mm
Resistance: High
 
Large Shank standard European for most modern 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 the 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.