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
GRUNDIG GDM-10 Vintage Microphone Made in Germany Braided Cord 1956 | eBay
Buy Vintage GRUNDIG GDM 15 VINTAGE MIC FOR OPEN REEL RECORDER Sale Pune-India
Grundig GDM 311 Microphone 60er years NOS | Reverb
Grundig GDM 318 Microphone with original box-stand , black | Reverb
Grundig GDM 110 microphone - Bakelite - Catawiki
GRUNDIG GDM 10, dynamisches Mikrofon, Kabel mit alten Stecker in Mitte - Wedding | Weitere Audio & Hifi Komponenten gebraucht kaufen | eBay Kleinanzeigen
VINTAGE MICROPHONE GRUNDIG GDM318SC complet année 70 dans sa boite d'origine EUR 18,00 - PicClick FR
45 Vintage and Antique Microphones (Functional and Decorative) - Oldest.org