[ Marc Goodman wrote in 201108 MMD, "Does anyone know where I can
 [ get a list of the Duo-Art roll numbering systems, for production
 [ dates, etc.?"

Are you referring to the [Smith] catalog for Duo-Art rolls?

Skip Klosz

 [ Smith, Charles Davis: Duo-Art piano music : a complete classified
 [ catalog of music recorded for the Duo-Art reproducing piano /
 [ compiled and annotated by Charles Davis Smith.  Publ. by The Player
 [ Shop, 625 S. Myrtle Ave., Monrovia, Calififornia, circa 1987.
 [ https://www.amazon.com/Duo-Art-Piano-Music-Classified-Reproducing/dp/B0006EQTJG 
 [ -- Robbie