Once upon a time (i think i posted something) i got a Cerveny tuba, and the seller had what he thought was a mouthpiece (to his defense, there was no neck, so he couldn't try it out) which as best as i can tell is a mysterious brass funnel.
Fast forward to recent times, and my personal Eb renaissance is somewhat fueled by an old scratched up mouthpiece i was in no hurry to look amid the scratches for markings, but a friend had picked out enough to say it was cerveny. I finally examined it, and yeah, it does.
I don't suppose anyone else has Cerveny mouthpieces?
(promised new picture... added)
"All art is one."
-Hal
"Kinds? There aren't any kinds. There's just music." said Kieth "There's always music, if you listen."
-Kieth (from The Amazing Maurice, by Sir Terry)