Even if it doesn't work it should easily be repaired or repurposed for another application.
Telephone Microphone Receiver …. - SP298
1930s/40s GPO W-09 Radio Microphone Bakelite (Vintage Art Deco)
R-390A/URR Receiver Radio Set Instructions Manual Radio - RR10
Clansman PRC349 Radio Headset Throat Microphone British Army Military Tested
BBC Brownie No 2 Radio Receiver
B34 Eddystone Receiver Radio
