File:Britannica Pianoforte Action Based on German Escapement Principle.png
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:44, 26 August 2009 | 862 × 238 (5 KB) | Bob Burkhardt | {{Information |Description={{en|1=Old piano action based on the German principle of escapement. Square piano belonging to M. Gosselin, Brussels.}} |Source=Encyclopædia Britannica, 11th ed., Vol. 21, p. 567 |Author=unknown |Date=before 1911 |Permission={{ |
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