GPO CHEST MICROPHONE, 1940's

Transmitter Breast Sound Powered No2-Mk3
Used by Telephone Switchboard Operators.

Your comments:

• have similar transmitter
  very good condition , almost new
  was told is WW2 warbird communicator
  for navigator/gunner to pilot
  obviously not true
  see picture on on ebay 111015816299
  thanks
  .......... tom littich, munich / germany, 2nd of March 2013
  
  
• I have a similar switchboard operator headset and a metal triangle chest plate close to this picture. The headphone and plug is intact. The plug has a patent in U.S.A. Sept. 24, 1912 with a number 137 on it. I know it came from Chicago, Ill. and was used in the 40's by my mother, and probably earlier. None of the sets I have seen look like the one I have.
  .......... Rose, Carlsbad, California, USA, 19th of October 2011
  
  

A0908