Invention or Discovery: Advance In Self-Playing Piano-Forte
Invention: Decided advance in the "expression" of self-playing piano-fortesDate: 1878
Inventor: Gally
Birthplace: United States
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| Invention or Discovery: Advance In Self-Playing Piano-ForteInvention: Decided advance in the "expression" of self-playing piano-fortesDate: 1878 Inventor: Gally Birthplace: United States
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