rowuk

I don't expect that you will be seeing too many of these horns around. They are a very, very light rotary valved Bb with the keys upright like on the piston trumpet.
Way too light for symphonic stuff and not the right sound for big band. As a gimmick for Mnozil Brass it is just fine. I played one before Christmas and it had some intonation issues. Not so easy to hold either.