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http://community.webshots.com/album/547617955kiKleJ

Wonderful Boosey & Hawkes BBb Tuba for sale with Mouthpiece and Gig Bag. Mouthpiece receiver recently upgraded to accept standard shank mouthpieces. Click the hyperlink above for all the info. Asking $900 plus shipping or best offer. Very nice dixieland jazz horn!

Do you still have the original receiver in case someone wants to put it back on?

Hello. Yes, I still have the original receiver for it along with a mouthpiece stamped with "18" that has a tapered shank, which is what I used before having the newer receiver put on.