The 'C' encircled broad arrow is usually found on Canadian equipment. The webbing ends are clearly 1937 webbing type...No idea what it is though.
Yes why didn't I think of that!, they were found in a box with two hand microphones!! The small button is for pushing the microphone handle switch in. Thanks so much!
Would this of been used by a tank driver as their were two tank driver headsets and a Ty throat microphone as well