Re: 3+1 - function of the 4th valve clamp?


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Posted by Bill on May 16, 2002 at 06:50:32:

In Reply to: 3+1 - function of the 4th valve clamp? posted by Kenneth Sloan on May 15, 2002 at 23:20:51:

The Besson prototype tubas had a clamp to hold the fourth valve down so that an EEb would become a BBb.



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