My friend Centralrepair has made an astonishing discovery while watching an episode called "Robot" of the original Sixties series "Mission Impossible"...
It seems that the circuit board in the original Communicator prop (first seen in "The Cage")... is a FOUND object!
Or at least many more boards were made than were used in comms. But we're leaning towards "found object".
Also the fabric from the Desk and Wall Comm panels can be seen in this episode.
framegrabs from "Robot"