This is an Altec condenser microphone with an omni-directional polar response, manufactured circa 1973.In the archival image with four microphones, it is the right-most microphone.
This is an Altec condenser microphone with an omni-directional polar response, manufactured circa 1973.In the archival image with four microphones, it is the second from the right.
This is an Altec condenser microphone with an omni-directional polar response, manufactured circa 1955.In the archival image of four microphones, it is the microphone second from the left.
This is an Altec condenser microphone with an omni-directional polar response, manufactured circa 1955.In the archival image with four microphones, it is the microphone on the far left.