Baird Phonovision (Televisor) disc RWT620-4, recording of a man's head in motion on a disc produced by the Columbia Gramophone Company Ltd, made by John Logie Baird 10 January 1928. Baird Phonovision Disc 1927-1929
Baird 'Phonovision disc', 1927-1928. Early experimental system for recording television signals on to phonograph records. Baird Phonovision disc, 1927-1928 1927-1928
