Posted by Klaus on July 18, 2000 at 10:59:48:
In Reply to: Re: Re: Mercedes tuba posted by keith C. on July 18, 2000 at 08:41:38:
What told about the Mercedes might apply to your Sonora as well. I can not say anything more precily without knowing somthing about the valve mechanism.
If you could send me a JEPG picture I might have some chance to compare to a catalogue.
Klaus