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"Dralowid" Reporter Carbon-Microphone, 1927...
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A Group of 8 interesting Microphones, from 19...
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1 Crystal and 5 Magnetic Microphones, after 1...
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Carbon Cross-Flow Microphone, c. 1938...
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Sennheiser MKH 805 Shotgun Microphone, c. 196...
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1 Dynamic and 5 Carbon Microphones, c. 1927...
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2 Hand-Held Carbon Microphones...
