View Original: | Copper electrotype of unknown original lateral sound recording, for stamping out multiple pressings, Alexander Graham Bell, deposited in October 1881 - National Museum of American History - DSC00107.jpg (3806x3354) | |||
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Keywords: Copper electrotype of unknown original lateral sound recording, for stamping out multiple pressings, Alexander Graham Bell, deposited in October 1881 - National Museum of American History - DSC00107.jpg en Exhibit in the National Museum of American History Washington DC USA Photography was permitted in the museum without restriction 2015-03-27 11 03 21 own Daderot other versions PD-1923 cc-zero Graphophones in the National Museum of American History |