ITT's Electronic Transducer

I have this transmitter I got in a bright orange ITT handset labeled ITT Electronic:

It's got an unusual indented front:

There's a gold sticker on the back with the text

Part No.
184305 - 102
Electronic
Transducer

The part has the actual punching 183464, and a date stamp of 9-84:

It doesn't work (electrically or mechanically) in place of a normal carbon transmitter.