Perantucci Tuba Mouthpiece 64-S - Silver Plated
 
These mouthpieces are all new old stock and also include the "Mr Tuba" stamped on the mouthpiece from the factory.

Perantucci say about this mouthpiece
Considerable research and experimentation was necessary before a revolutionary F-tuba mouthpiece, PT-64, was introduced in 1973. PT-64 was the first F-tuba mouthpiece to combine acceptable diameter with cup, throat and back-bore balanced for fast response, good intonation and high range accessibility. PT-64 was an instant success and quickly established itself as one of the world’s most popular F-tuba mouthpieces. Its signature is ease of use, brilliant live sound and great projection.

Cup: 32.0 mm
Medium-flat pear shape
Edge: 8.5 mm
Bore: 7.8 mm
 
Please note that I do not offer approval / testing on these mouthpieces, so please ensure you know what you are ordering when placing an order.
 
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.