| Digest Nr | Subject and Author |
|---|
 |
| 2006.12.10.06 | Music Roll Spool Core Discoveries, from Niels Berkers |
| 2006.12.10.05 | Music Roll Spool Core Discoveries, from Donald Barton |
| 2006.12.09.07 | Music Roll Spool Core Discoveries, from Debbie Legg |
| 2006.12.09.06 | Music Roll Spool Core Discoveries, from Sam Harris |
| 2006.12.09.05 | Music Roll Spool Core Discoveries, from Jack M. Conway |
| 2006.12.08.04 | Music Roll Spool Core Discoveries, from Paul W. Harris |
| 1998.12.11.09 | Discoveries Inside Mechanical Musical Instruments, from Bruce Clark |
| 1998.12.11.08 | Discoveries Inside Mechanical Musical Instruments, from Dave Brown |
| 1998.12.11.07 | Discoveries Inside Mechanical Musical Instruments, from Marty Roenigk |
| 1998.12.10.01 | Discoveries Inside Musical Instruments, from Mike Kitner |
|
