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Telharmonium
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| Description | Keyboard of the Telharmoic apparatus for producing music electrically |
| Date | c1906 |
| Place | USA | New York |
| Topic | Engineering | Electricity | Electric music |
| Topic | Engineering | Electricity | Telephones |
| Image information | [1667 x 1269] 469 KB |
| Price | €7.95 |
