Photograph entitled 'The original 30-line disc television transmitter in the headquarters of the German Post Office'

Photograph (top left of this page) with caption 'The original 30-line disc television transmitter in the headquarters of the German Post Office of Berlin, and used for carrying out experimental transmissions from the Witzleben Tower in 1929.' From a collection of photographs illustrating the early experimental television work of John Logie Baird, 1924-1938.