| Digest Nr | Subject and Author |
 |
| 2025.07.16.01 |
Seek Antique Bryant Center Hole Mount Receptacle, from Dave Krall |
| 2018.11.30.02 |
Hole In The Sound Board, from Grahame Code |
| 2014.10.10.04 |
Player Piano Roll Hole Shape, from Jack M. Conway |
| 2014.10.08.03 |
Player Piano Roll Hole Shape, from Art Reblitz |
| 2012.01.14.04 |
Source of PPCo Piano Roll Hole Punch, from Don Teach |
| 2012.01.12.06 |
Seek PPCo Piano Roll Hole Punch, from Paul Horgan |
| 2010.07.23.06 |
Piano Roll Hole Punch, from Hi Babit |
| 2010.07.23.05 |
Piano Roll Hole Punch, from Matthew Caulfield |
| 2010.07.23.04 |
Piano Roll Hole Punch, from Spencer Chase |
| 2010.07.22.15 |
Seek Piano Roll Hole Punch, from Tom Hutchinson |
| 2008.12.20.04 |
Feeder Hole Diameter in Pressure Roller Organs, from Todd Augsburger |
| 2006.12.29.01 |
Music Roll Hole Dimensions, from Doug Anderson |
| 2005.08.30.02 |
Polyphon 11-inch Discs With Single Driving Hole, from Joe Berman |
| 2004.10.15.05 |
Wurlitzer & Philipps Tracker Bar Hole Spacing, from Art Reblitz |
| 2004.04.30.02 |
Music Roll Spools With Square Drive Hole, from Richard Vance |
| 2003.09.28.07 |
Hole Spacing of Wurlitzer APP Tracker Bar, from Julie Porter |
| 2003.09.13.07 |
Hole Spacing of Wurlitzer APP Tracker Bar, from Don Teach |
| 2003.09.12.08 |
Hole Spacing of Wurlitzer APP Tracker Bar, from Bob Billings |
| 2003.03.06.02 |
Piano Rolls With Square Drive Hole in Flange, from Christofer Noering |
| 2003.03.05.05 |
Piano Rolls With Square Drive Hole in Flange, from Christofer Noering |
| 2003.03.05.04 |
Piano Rolls With Square Drive Hole in Flange, from Nicholas Simons |
| 2003.03.04.07 |
Piano Rolls With Square Drive Hole in Flange, from Tom Hawthorn |
| 2003.02.08.09 |
Hole Diameter of T-100 Red Welte Music Roll, from Bob Billings |
| 2002.07.01.09 |
Small Hole Brass Bleed Cups, from Richard Vance |
| 2002.07.01.08 |
Small Hole Brass Bleed Cups, from Craig Brougher |
| 2002.06.30.04 |
Seek Small Hole Brass Bleed Cups, from Joyce Brite |
| 2002.06.13.01 |
Two Row Tracker Bar Hole Spacing, from Jim Crank |
| 2000.08.21.05 |
Narrow QRS Roll with Square Drive Hole, from Jeff Lofton |
| 1999.02.13.03 |
49-Key Marenghi of Wookey Hole Caves, Somerset, from Jeremy Brice |
| 1999.02.06.03 |
49-Key Marenghi of Wookey Hole Caves, Somerset, from Tim Blyth |
| 1998.10.12.06 |
Tracker Bar Hole Sizes, from Jeremy Brice |
| 1998.10.11.04 |
Tracker Bar Hole Size, from Tom Griffith |
| 1997.08.20.15 |
Hole Size Affects Response Time, from Bob Billings |
| 1996.11.30.04 |
Trackerbar hole distances, from Craig Brougher |
 |