The most recent submissions are listed first.
| Digest Nr | Subject and Author |
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| 2007.02.25.01 | Harper Electric Piano Co., Ltd., of London, from Paul Camps |
| 2007.02.23.05 | Harper Electric Piano Co., Ltd., of London, from David Evans |
| 2007.02.22.02 | Harper Electric Piano Co., Ltd., of London, from Neal Anderson |
| 2006.04.02.03 | Harper Electric Piano "Pneuma" & "Reliance" Rolls, from Paul Camps |
| 2006.04.01.04 | Harper Electric Piano & "Original Pneuma" Rolls, from Julian Dyer |
| 2003.06.30.08 | Harper Electric Piano Rolls, from Julian Dyer |
| 2003.06.30.07 | Harper Electric Piano at Ashorne Hall, from Paul Camps |
| 2003.06.29.05 | FS: Harper Electric Piano Co. Rolls 34 cm Wide, from Brian Chesters |
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