Seems to be rare?? as we could not find much info or completed ones like it.

A helpful ebayer share this info"This mike was used by the US Army and Navy. They used it in Sound reproducer devices"

Handheld mic  with cable (no plug but you can put on a 1/4", XLT etc. or hardwire it)

We did temporarily connect wires to a plug and into a mixer and talked into it and it worked fine.

Has signs of handling and a scratch or crack in the plastic. 

5" long by 1" diameter at head

9v battery is only for size comparison (it does NOT use any batteries)

5oz