TubeNet

I own a Conn Helleberg. It has an American shank. I don't believe it's available with a Euro shank. What other mouthpiece, available with a Euro shank, is most similar to the Conn Helleberg? Brass or stainless, doesn't matter.

Sidey SSH models, if you don't mind stainless steel - http://www.sshmouthpieces.com/order/index.html

Laskey 28H, 30H.

I've never seen either, but if you want something that's really seriously like Conn's mouthpieces, from what I've read, the SSH is for you. Most everyone else, unless they're making a straight copy, will round the rim over more, and round the cup profile out more.

I agree with the SSH suggestion. But they too are a little bit different from the Conn. You could also buy and adapter to change the American shank to Euro. If you want to try a Laskey they're slightly different as well. Or you could pay a lot of money and have a custom mouthpiece made. Happy hunting!

http://www.dougelliottmouthpieces.com/cbtuba.html

TU R or T cup with Euro taper shank?

My R cup is very close to the shape and depth of a Helleberg... not a copy at all, but pretty much the same kind of funnel shape. A 4N130, or N130 Flat (same thing) rim is the traditional Helleberg rim shape and size, totally flat on top. And I have Euro shanks as well as all the other shank choices.