MMD Archives September 2021 Contents of Digest 2021.09.12 Prev  Next Nr Subject Author 01 Mechanical Music Auction in Cologne 24 Sep. 2021 Uwe Breker 02 Who Developed the Art Apollo Expression System? Rich Schommer 03 Seek Rolls Played By Ruggero Leoncavallo Ray Bauer 04 FS: Lot of 12,000 Piano Rolls RJ Ingram