| Digest Nr | Subject and Author |
 |
| 2020.10.02.03 |
Hupfeld DEA Vorsetzer on YouTube, from Douglas Heffer |
| 2017.12.25.05 |
Seek Hupfeld DEA Player Mechanism, from Marc Widuch |
| 2015.01.31.03 |
FS: Hupfeld DEA Piano Rolls, from Mike Boyd |
| 2013.01.09.02 |
Music Rolls for Hupfeld DEA Vorsetzer, from Douglas Heffer |
| 2013.01.06.01 |
Seek Music Rolls for Hupfeld DEA Vorsetzer, from Franco Severi |
| 2009.07.19.03 |
FS: Hupfeld DEA Reproducing Piano Rolls, from Philip Jamison |
| 2006.05.10.04 |
FS: Hupfeld DEA Upright in Pennsylvania, from Philip Jamison |
| 2005.04.25.10 |
FS: Collection of Hupfeld DEA Music Rolls, from Jonas Anhede |
| 2004.06.27.05 |
Catalog of Hupfeld DEA Piano Rolls, from Eberhard Vogel |
| 2004.05.13.06 |
FS: Pleyel DEA Reproducing Piano in France, from Robbie Rhodes |
| 2002.04.18.12 |
Seek Roenisch Hupfeld DEA Electrical Data, from Miguel de Mattos |
| 2002.03.24.09 |
Seek Roenisch Hupfeld DEA Connection Data, from Miguel de Mattos |
| 2002.01.27.08 |
Hupfeld DEA Music Rolls Recut by Thomas Jansen, from Nicholas Simons |
| 2002.01.27.07 |
Hupfeld DEA Reproducing Player Piano, from Dan Wilson, London |
| 2002.01.26.08 |
Hupfeld DEA & Rolls for Dienst Player Mechanism, from Nicholas Simons |
| 2002.01.25.05 |
Restoring Roenish Hupfeld DEA in Lisbon, from Miguel de Mattos |
| 2000.07.06.18 |
Hupfeld Dea, Phonola & Triphonola, from Jonathan Holmes |
| 1998.03.16.07 |
Hupfeld Dea, Duo-Art, or Movies ?, from Philippe Rouillé |
| 1998.03.13.02 |
Teresa Carreno Hupfeld DEA Rolls, from Wayne Stahnke |
| 1996.05.10.10 |
FS: 77 Hupfeld DEA Rolls, from Andreas Hohlfeld |
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