"Dralowid" Reporter Carbon-Microphone, 1927

A Group of 8 interesting Microphones, from 1925

1 Crystal and 5 Magnetic Microphones, after 1935

Carbon Cross-Flow Microphone, c. 1938

Sennheiser MKH 805 Shotgun Microphone, c. 1965

1 Dynamic and 5 Carbon Microphones, c. 1927

2 Hand-Held Carbon Microphones