Posted by Paul Scott on June 03, 2001 at 22:33:06:
In Reply to: Re: Re: Re: Re: Martin Sousaphone info.? posted by Sten Sandahl on May 31, 2001 at 06:25:40:
Yes; Martin of the 20's and 30's used an 80% copper 20% zinc formula. I think this might have changed after World War II, (if anyone has more defintite information, please e-mail me).