The microphone is a single button carbon element that requires a small bias voltage. The bias voltage is supplied by the transmitter or other equipment that the T-32 was used with. Audio reproduction is communications quality. The element can be readily replaced, if necessary. The push-to-talk switch can be used to actuate the equipment that the microphone is to be used with. The T-32 dates from the late twenties and was mainly used for military communications up to WWII and commonly used well into the fifties. A very popular microphone with the Signal Corps.
You see them sometimes in combination with English T-1154 transmitter.
Whether the firm Kellogg perhaps inspired by the creaking and crackling of carbon-microphones, started producing cornflakes, I don't know. That will be another Kellogg?
The adjustable "Transmitter", the microphone which could be moved in the vertical direction.
"Push to talk" switch. With the aid of a long rod is by this lever to the switch in the foot operated.
Bottom of the foot with the "T-32" designation.
The foot plate unscrewed.
This image shows the switch with the terminal block.
The talk section removed.
The carbon-mike with holder. The holder is dated 1941 and the mike is from 1942.
Detail of the carbon-mikel.
The audio quality is state of technology of that time is rather good. The Kellogg Company used this model as a telephone set. There was a hook on the side to which the headset was hung up.