Posted by Mike's comment on July 26, 2002 at 12:31:49:
In Reply to: Mike Johnsons's tuba conversions posted by Klaus on July 26, 2002 at 11:53:55:
The Orenophone is mostly B&H parts everything else was made by me. The
fourth valve is a rotor and directly next to the 3rd valve, all except the
2nd valve are open wrapped.