Perantucci Tuba Mouthpiece PT-86 Silver Plated
 
These mouthpieces are all new stock and some also include "Mr Tuba" stamped on the mouthpiece from the factory.
 
Perantucci say the following about this mouthpiece.
Model PT-86 offers a very wide cup for players with particularly large lips. It favours middle and low registers, particularly where high volume is desired. The tonal character is round and weighty.

Cup Diameter : 33.7 mm diameter. Very wide diameter with moderate depth. 
Rim : Width 7.5 mm. Slightly rounded inner edges.
Bore : 8.3 mm. 
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.