| Digest Nr | Subject and Author |
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| 2008.06.09.05 | Seek 73-note Rolls for Hupfeld Phonola, from Carlos das Neves |
| 2008.02.18.03 | Hupfeld Auto Roll Tracker Operation on Re-roll, from Scott Hiler |
| 2008.02.15.04 | Hupfeld Auto Roll Tracker Operation on Re-roll, from Niels Berkers |
| 2008.02.14.06 | Hupfeld Auto Roll Tracker Operating on Re-roll, from Scott Hiler |
| 2007.12.06.08 | Hupfeld 88-note Claviola, from Brenton Jenkins |
| 2007.06.05.04 | Tempo of Hupfeld Piano Roll, from Randolph Herr |
| 2007.05.19.04 | Hupfeld Phonola Plays Extra Notes, from D. L. Bullock |
| 2007.05.18.09 | Hupfeld Phonola Plays Extra Notes, from Niels Berkers |
| 2007.03.08.05 | Seek Hupfeld 73-note Tracker Bar, from Mark Williamson |
| 2006.12.06.03 | Seek Hupfeld Phonoliszt-Klavier Expression Rolls, from Leonardo Forti |
| 2006.05.17.09 | Hupfeld "Clavitist" Fallboard Decal, from Nicholas Simons |
| 2006.05.16.06 | Hupfeld "Clavitist" Fallboard Decal, from Philip Jamison |
| 2006.05.10.04 | FS: Hupfeld DEA Upright in Pennsylvania, from Philip Jamison |
| 2006.03.14.02 | Restoring a Hupfeld Phonola, from Niels Berkers |
| 2006.02.02.07 | FS: 1912 Roenisch Hupfeld Solophonola 7 Foot Grand, from Paddy Handscombe |
| 2005.09.27.08 | Wind Motor Governor in Hupfeld Solodant Player, from Paddy Handscombe |
| 2005.09.23.07 | Wind Motor Governor in Hupfeld Solodant Player, from Roger Waring |
| 2005.08.15.07 | FS: Hupfeld Phonola Rolls, from Rick Cooley |
| 2005.07.31.11 | Seek Hupfeld Animatic T or Triphonola Test Roll, from H. Sulzener |
| 2005.06.19.03 | Hupfeld Atlantic Barrel Orchestrion, from Christian Hromatka |
| 2005.05.12.06 | FS: Hupfeld Solodant Phonola Rolls, from Peter Hamm |
| 2005.04.25.10 | FS: Collection of Hupfeld DEA Music Rolls, from Jonas Anhede |
| 2005.04.21.07 | Recordings of Mills Violano & Hupfeld Violina, from Stephen B. Small |
| 2005.03.31.03 | Watermarks in Hupfeld Music Roll, from Julian Dyer |
| 2005.03.29.01 | Watermarks in Hupfeld Music Roll, from Paddy Handscombe |
| 2005.03.28.05 | Hupfeld Roll & Box Labels, from Niels Berkers |
| 2005.01.03.13 | FS: Hupfeld Solophonola, from Mark Day |
| 2004.11.30.03 | Database of Hupfeld Piano Rolls, from Robert Senior |
| 2004.10.21.01 | Database of Hupfeld Piano Rolls, from Robert Senior |
| 2004.08.28.10 | FS: Hupfeld Solophonola in UK, from Mark Day |
| 2004.06.27.05 | Catalog of Hupfeld DEA Piano Rolls, from Eberhard Vogel |
| 2004.02.27.05 | FS: Hupfeld "Sinfonie Jazz" Orchestrion, from Bernt Damm |
| 2004.02.27.02 | Seek Schoenberg Op. 11 On Hupfeld Roll, from Wolfgang Heisig |
| 2004.01.17.05 | FS: Book "Im Aufnahmesalon Hupfeld" in Australia, from Albert Petrak |
| 2003.09.12.07 | Hupfeld Animatic Scandinavian Player Piano Rolls, from Eberhard Vogel |
| 2003.09.08.06 | Liszt "Annees de Pelerinage" on Hupfeld Rolls, from Julian Dyer |
| 2003.09.07.04 | Liszt "Annees de Pelerinage" on Hupfeld Rolls, from Nicholas Simons |
| 2003.09.06.02 | Hupfeld 53773 "Vallee d'Oberman", from Albert Petrak |
| 2003.09.05.03 | Seek Hupfeld 53773 "Annees de Pelerinage", from Tony Dellaway |
| 2003.08.30.05 | A. H. Grunert Piano With Hupfeld Player Action, from Christine Robinson |
| 2003.08.30.04 | Seek Hupfeld Phonola Vorsetzer, from Philip Jamison |
| 2003.08.27.05 | FS: English Text for "Im Aufnahmesalon Hupfeld", from Albert Petrak |
| 2003.08.13.04 | English Text for Book "Im Aufnahmesalon Hupfeld", from Robbie Rhodes |
| 2003.06.14.04 | A. H. Grunert Piano With Hupfeld Player Action, from Christine Robinson |
| 2003.05.22.07 | 88-note Hupfeld Action in Lipp Piano, from John Phillips |
| 2003.05.18.12 | Hupfeld Claviola Push-up Player, from Brian Chesters |
| 2003.05.18.11 | Hupfeld Claviola Push-up Player, from Roger Waring |
| 2003.05.17.05 | Hupfeld Claviola Push-up Player, from John Farrell |
| 2003.05.16.07 | Roenisch & Hupfeld & Claviola, from Dan Wilson, London |
| 2003.01.23.06 | Hupfeld Music Roll Has Center Sprocket Holes, from Christian Greinacher |
| 2003.01.18.06 | FS: Hupfeld Orchestrion, from Philip Jamison |
| 2003.01.17.02 | Music Roll Has Center Sprocket Holes - Hupfeld, from Nicholas Simons |
| 2002.07.25.12 | Regulating a Hupfeld Solophonola, from James Senior |
| 2002.06.01.04 | FS: Torch Lamp Shades As Seen On Hupfeld Orchesstrion, from Stephen Kent Goodman |
| 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 |
| 2002.03.22.14 | Hupfeld Clavitist Pump Speed, from Peter Coggins |
| 2002.02.22.05 | Hupfeld Claviola Pushup Player, from Brian Chesters |
| 2002.02.21.09 | FS: Hupfeld Claviola Pushup Player in UK, from John Farrell |
| 2002.02.18.08 | Roenisch Hupfeld Clariona Player Piano, from Michael Woolf |
| 2002.01.28.01 | Book "Im Aufnahmesalon Hupfeld", from Julian Dyer |
| 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 |
| 2002.01.25.04 | Seek Rolls for Dienst Hupfeld Player Mechanism, from Knut Iversen |
| 2001.10.29.04 | Book "Im Aufnahmesalon Hupfeld" & Edvard Grieg, from Albert Petrak |
| 2001.09.11.05 | Hupfeld Animatic S Pianos and Music Rolls, from Julian Dyer |
| 2001.09.09.05 | Seek Hupfeld Animatic Rolls, from Robert Senior |
| 2001.05.14.07 | Seek Hupfeld 73- and 88-note Piano Rolls, from Kevin McElhone |
| 2001.02.10.03 | Seek Hupfeld Triphonola Tube Diagram, from Miguel de Mattos |
| 2001.01.13.06 | Hupfeld Animatic Clavitist Rolls, from Richard Stibbons |
| 2001.01.12.12 | Hupfeld Animatic & Clavitist Cafe Pianos, from Tom Jansen |
| 2000.12.07.03 | Hupfeld Phonoliszt Violina Instruments, New & Old, from John Rutoskey |
| 2000.12.06.03 | Hupfeld Phonoliszt Violina Instruments, New & Old, from Larry Mayo |
| 2000.12.04.09 | FS: Hupfeld Phonoliszt Violina Music Rolls, from Paul Camps |
| 2000.08.08.07 | Hupfeld Triphonola Roll Description, from Julian Dyer |
| 2000.08.04.12 | FS: Hupfeld Helios Tracker Bar, from Brian Thornton |
| 2000.07.29.08 | FS: Hupfeld Helios Tracker Bar, from Brian Thornton |
| 2000.07.23.05 | Source of Hupfeld Triphonola Rolls, from Tom Jansen |
| 2000.07.10.09 | Hupfeld Triphonola Piano and Roll Library, from Alan Whytock |
| 2000.07.09.07 | Hupfeld Triphonola Piano & Roll Library, from Dan Wilson, London |
| 2000.07.07.12 | FS: Hupfeld Phonola Converted for 88-Note Rolls, from Roger Waring |
| 2000.07.06.19 | Hupfeld Triphonola Reproducing Piano System, from Paddy Handscombe |
| 2000.07.06.18 | Hupfeld Dea, Phonola & Triphonola, from Jonathan Holmes |
| 2000.07.06.17 | Hupfeld Triphonola Piano & Roll Library, from Julian Dyer |
| 2000.07.06.16 | Hupfeld Triphonola Reproducing Piano System, from Adam G. Ramet |
| 2000.07.05.08 | Hupfeld Triphonola Piano & Roll Library, from Jonathan Holmes |
| 2000.06.27.08 | Delay Line Oscillator in Hupfeld Percussion, from Bernt Damm |
| 2000.06.24.07 | Delay Line Oscillator in Hupfeld Percussion, from Art Reblitz |
| 2000.06.23.10 | Lead Tubing in Hupfeld Orchestrions, from Bernt Damm |
| 2000.05.19.11 | Hupfeld Wind Motor Governor, from Roger Waring |
| 2000.05.18.11 | 72-Note Hupfeld Plays 88-Note Rolls, from Roger Waring |
| 2000.05.16.08 | Hupfeld Animatic Clavitist with Orchestra Cabinet, from Craig Robson |
| 2000.01.27.05 | Prices Paid for Hupfeld Phonoliszt-Violina, from D. L. Bullock |
| 1999.11.10.11 | Hupfeld Solophonola Control Subtleties, from Paddy Handscombe |
| 1999.10.31.09 | Hupfeld Solophonola, from Paddy Handscombe |
| 1999.10.29.13 | Stuck Notes in Hupfeld Solophonola, from Don Teach |
| 1999.10.29.12 | Hupfeld 73/88-note Solophonola in Roenisch Grand, from Julian Dyer |
| 1999.10.29.11 | Hupfeld Solophonola & Aeolian Themodist Systems, from Dan Wilson, London |
| 1999.10.28.04 | Hupfeld 73/88-note Solophonola in Roenisch Grand, from Roger Waring |
| 1999.07.14.09 | Roenisch Hupfeld Tri-Phonola, from Wolfgang Heisig |
| 1999.07.14.08 | Hupfeld T-Animatic and Triphonola Rolls, from Dan Wilson, London |
| 1999.07.13.10 | Seek Hupfeld Triphonola Rolls, from Wolfgang Heisig |
| 1999.06.10.11 | FS: Hupfeld Helios, from Bill and Dee Kavouras |
| 1999.04.14.06 | Hupfeld Phonola Rolls, from Julian Dyer |
| 1999.04.14.05 | Themodist Rolls Made for Choralion by Hupfeld, from Dan Wilson, London |
| 1999.04.13.08 | Hupfeld Phonola Rolls, from John Phillips |
| 1999.04.12.12 | Hupfeld Phonola Rolls, from Ian Sanderson |
| 1999.02.23.04 | Hupfeld Pan Orchestra & Hupfeld Harmonium, from Art Reblitz |
| 1999.02.23.04 | Hupfeld Pan Orchestra & Hupfeld Harmonium, from Art Reblitz |
| 1999.02.21.02 | Hupfeld Harmonium, from Dave Brown |
| 1999.02.01.14 | Ludwig Accordion & Ludwig Hupfeld Pianos, from begrlg@swbell.net |
| 1999.01.10.01 | Ludwig Hupfeld Company Today, from Hauke Marxsen |
| 1998.10.30.11 | FS: Bluthner Hupfeld Player, from Brian Chesters |
| 1998.09.02.14 | Rolls & Player Pianos by Ludwig Hupfeld AG, from Dan Wilson, London |
| 1998.09.02.13 | Seek 73-note Rolls for Hupfeld Phonola, from Jon Carpenter |
| 1998.09.01.14 | Hupfeld Duo-Art & Marque Ampico, from Patrick Boeckstijns |
| 1998.07.18.09 | Seek Component for Hupfeld Phonola in Spain, from Esther Bergareche |
| 1998.06.22.21 | Hupfeld and Grunert Electric Player Piano, from Tom Lahey |
| 1998.03.24.11 | Hupfeld Helios Soft Swell Control System, from Brian Thornton |
| 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 |
| 1998.01.26.15 | Hupfeld Vorsetzers, from John Wolff |
| 1998.01.22.13 | Types of Hupfeld Vorsetzers, from John Phillips |
| 1998.01.22.12 | Hupfeld Roll Boxes Split at Corners, from John Phillips |
| 1998.01.20.04 | Types of Hupfeld Vorsetzers, from Rod Cornelius |
| 1997.12.27.18 | Hupfeld Sinfonie Jazz Orchestrion, from Bernt Damm |
| 1997.12.25.10 | Hupfeld Sinfonie Jazz Orchestrion, from Bernt Damm |
| 1997.06.03.17 | 1910 Bluthner Hupfeld Player, from Greg Flannagan |
| 1997.04.25.15 | FS: Hupfeld Hand-cranked Player Piano, from Andreas Hohlfeld |
| 1997.03.30.08 | Hupfeld 73-note Rolls, from Dan Wilson |
| 1997.03.26.11 | Seek Hupfeld Solodant Plans, from Bill Ryan |
| 1997.03.25.14 | Seek Hupfeld Solodant Plans, from Mathias Pfisterer |
| 1996.12.02.02 | Re: Speed of Hupfeld Rolls, from Rob DeLand |
| 1996.11.28.09 | Speed of Hupfeld Rolls, from John Phillips |
| 1996.11.27.02 | Re: Speed of Hupfeld Rolls, from Dan Wilson |
| 1996.11.26.02 | Speed of Hupfeld Rolls, from John Phillips |
| 1996.11.21.05 | Hupfeld Phonola Rolls, from Dan Wilson |
| 1996.11.18.04 | Hupfeld Phonola Rolls, from John Phillips |
| 1996.11.16.03 | Hupfeld Phonola Rolls, from Wayne Stahnke |
| 1996.05.10.10 | FS: 77 Hupfeld DEA Rolls, from Andreas Hohlfeld |
| 1996.04.30.01 | WTB: Lamps for Hupfeld Orchestrion, from Bill and Dee Kavouras |
| 1996.04.01.04 | FS: Hupfeld Solodant Rolls, from Bill and Dee Kavouras |
| 1996.01.06.04 | Help: Player Pianos ( Hupfeld), from Gordon Rumson |
| 1995.12.06.11 | Hupfeld rolls, from Mike Walter |
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