Posted by O'Dunkun on March 04, 2004 at 21:43:37:
I need some information about the hirsbrunner model-21 4P CC 4/4. I have found one that has only 4 piston valves. It does not have the fifth valve rotor for extended low register. I know you are thinking it is a BBb, definitely CC. Why did they build this horn without the fifth valve? How does this affect the value of the horn? I would appreciate any information.