1918 Western Electric CW-930 Carbon Microphone

This single-button carbon microphone was made by Western Electric during the WW-I period for use with their radiotelephone systems such as the CW-936.  As the leading telephone manufacturer of the day, the influence of telephone technology was obvious, and some of the parts are, in fact, identical to those used in their candlestick phones.  The primary differences are the lack of a base, and the push-to-talk button on the side.  The transmitter (microphone) element inside was a standard type 326W telephone unit.

The CW-929 horn loudspeaker and the CW-969 antenna switch were part of the same radio system.