Grundig GDM 18. I can't find any useful information about this microphone on the internet. This means i didn't know how to connect it. So I opened it. : r/audioengineering
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45 Vintage and Antique Microphones (Functional and Decorative) - Oldest.org
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VINTAGE MICROPHONE : GRUNDIG GDM-313 - YouTube
GRUNDIG GDM18 Vintage (1961) Microphone with 3 pin connector. BOXED :: - 비드바이코리아 - 해외 전문 경매대행 선두주자 - BIDBUY