| 4-chord zithers | Menzenhauer 4/15 chord-zither (#0 1/2) |
|---|
| Phonoharp 4/15 chord-zither (#1) |
| Phonoharp 4/15 chord-zither (#2) |
| Phonoharp 4/15 chord-zither (#2 1/4) |
| Menzenhauer 4/15 chord-zither (#2) |
| Phonoharp 4/16 chord-zither ("Yendrick's Club Special") |
| Schmidt 4/16 chord-zither ("Hawaiian Mandolin Harp") |
| Later Schmidt "standard" 4/16 chord-zither |
| Early Phonoharp 4/17 chord-zither |
| Phonoharp 4/17 chord-zither (#2 1/2) |
| Phonoharp 4/30 chord-zither |
| Menzenhauer 4/30 chord-zither |
| Schmidt 4/30 chord-zither |
| Marx Co. 4/30 chord-zither |