| Digest Nr | Subject and Author |
|---|
 |
| 2023.12.16.02 | Unknown Piano Roll Labels & Manufacturers, from John McClelland |
| 2022.04.23.01 | Wurlitzer Music Roll Manufacturers, from Bruce Pier |
| 2022.04.15.02 | Wurlitzer Music Roll Manufacturers, from David Stumpf |
| 2020.11.28.02 | List of Piano Roll Labels & Manufacturers, from John McClelland |
| 2020.10.05.02 | Manufacturers of Music Roll Brands & Labels, from John McClelland |
| 2020.10.03.04 | Manufacturers of Music Roll Brands & Labels, from John Grant |
| 2020.10.01.02 | Manufacturers of Music Roll Brands & Labels, from Richard Friedman |
| 2020.09.27.02 | Manufacturers of Music Roll Brands & Labels, from John McClelland |
| 2020.09.24.02 | Manufacturers of Music Roll Brands & Labels, from John McClelland |
| 2012.08.22.01 | Manufacturers of New Roll-operated Player Pianos, from John Taber |
| 2009.06.15.01 | Band Organ Manufacturers of North Tonawanda, from Doug Hershberger |
| 2009.03.10.02 | Automated Instrument Manufacturers of Leipzig, from Walter Tenten |
| 2008.11.04.07 | Manufacturers of Rubber Coated Cloth, from Brad Hunter |
| 2008.07.26.03 | American Barrel Organ Manufacturers, from Justin Senneff |
| 2008.07.26.02 | American Player Piano Manufacturers in 1912, from Francoise Dussour |
| 2008.07.25.02 | American Barrel Organ Manufacturers, from Don Teach |
| 2008.07.24.04 | American Barrel Organ & Piano Manufacturers, from Dave Bowers |
| 2008.07.24.03 | American Barrel Organ Manufacturers, from Justin Senneff |
| 2008.07.22.02 | American Barrel Piano Manufacturers, from Wallace Venable |
| 2008.07.22.01 | American Barrel Organ Manufacturers, from Francoise Dussour |
| 2008.07.21.01 | American Barrel Piano Manufacturers, from Wallace Venable |
| 2008.07.19.01 | American Barrel Organ Manufacturers, from Mike Roseboom |
| 2006.12.09.02 | Chicago Coin Piano Manufacturers, from Don Teach |
| 2006.12.07.02 | Chicago Coin Piano Manufacturers, from Art Reblitz |
| 2002.08.29.02 | Descendants of Piano Roll Manufacturers, from Jon Miller |
| 2000.09.25.01 | Seek Restoration Suppliers & Instrument Manufacturers, from Karl Ellison |
| 2000.08.17.08 | Player Piano and Player System Manufacturers, from John A. Tuttle |
| 2000.08.16.13 | Player Manufacturers and Player Actions Installed, from John A. Tuttle |
| 2000.01.07.01 | Small Crank Organ Manufacturers, from Andy Struble |
| 1998.03.21.05 | Seek Music Box Manufacturers, from Chad Hansen |
| 1997.11.19.01 | List of Music Box Manufacturers, from Bill Wineburgh |
| 1997.11.18.09 | Seek List of Music Box Manufacturers, from Bill Sheltmire |
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