The comments regarding the Audiographic Music rolls have been very
informative and interesting.  While acquiring my limited collection
of Duo-Art rolls I have found only a dozen Audiographic rolls.
All of these are in the "A" series.

I do have the "Salesmen's Demonstration Roll."  I am not interested
in parting with this roll but I do wonder if they have survived in
quantity or if they are rare?

Maury Willyard