Here is a very rare origional Conn-Helleberg mouthpiece. This one is in very nice condition considering it is about 100 years old or so. I believe this was the standard size they made back then. A truly fantastic all around mouthpiece. It is more important to have a fine mouthpiece than a fine horn. Sound starts from the mouthpiece.Many famous tuba players have used these such as Arnold Jacobs etc. I have only found two of these in my lifetime, so here is a rare chance to own one. This would be great for a player, or manufacturer to make a copy and sell. These were made by hand and it does make a difference in my opinion. The rim will need to be re-plated but the rest of the plating is good. On one side it is stamped with a letter K. Not sure what that is about. Starting this auction at 198 dollars with No Reserve. This is sold As Is with No returns. Any questions please ask in advance. Thankyou very much, and good luck, Len Shipping to Canada and Mexico will be 25 US dollars. Sorry that US postage is so high but that is my cost.