[retiredinprescott]

I took my cabinet out in bright sunlight and I can see where a hole was very carefully filled with a matching plug of wood. It's a nearly invisible repair which I assume was done when the cabinet was refinished. Thanks for everyone's help.
I'm not sure why the toggle switch was removed since when I join the two wires together, the noise suppression seems to adjust and work as it should.
I finally looked under the chassis and was surprised to see it is about 95% original. Just one or two caps tacked onto a couple of bakelite cap blocks. I'm really surprised this still works but I won't be playing it until I can recap the chassis after I contact Chuck Schwark and get a good schematic I can actually read and a parts list which hopefully will list the value of the caps and the resistors..
Thanks,
Mark