Marconi-Sykes Magnetophone microphone, complete with coil and spare coil, 1923. Serial No 286736. Label missing, but likely to be J2516. Very early moving coil microphone. DC energised. Uses the large flat coil as the diaphragm. Used at Savoy Hill, mounted in the 'Meat Safe' microphone stand.

Within six months of the start of broadcasting by the BBC, this new, improved microphone was introduced. It was used for the famous 1924 outside broadcasts of the song of a nightingale. It was so sensitive that sounds such as buzzing insects were picked up for the first time.