
I ran across this picture visiting a Hungarian tuba quartet's website.
It really looks like a Rudy bell but did they ever make a 3 top action piston model?
The valve section layout is also strange , with the 3rd valve slide in the front and I can't quite figure out how the other 2 are configured... Leadpipe seems custom too.
Is this a Frankentuba, a custom build or simply an older factory model?