[Vintage-Radio] Dictagraph

[GROSSMANCR@aol.com]

       I saw an item in an antique shop called a Dictagraph.  I'm not sure I 
know what it is.  It may be an old time listening device used to "Bug" 
someone.  It had a small 3 inch square black box that looked like a model 
train transformer, and old set of headphones, and two extra single ear pieces 
and a mess of wire.  All inside a small rectangular wooden case about a foot 
by 6 inches.  It was priced at $65.  Is anyone familiar with this device?

Chuck