1967 review of the Sennheiser MD421 microphone in Reel2ReelTexas.com's vintage recording collection | Sennheiser, Microphone, Tape recorder
Sennheiser MD21 + Base Stand Rare Vintage Microphone Mic Omni-Directional MD 21 | eBay
1960: Sennheiser MD 421
Sennheiser MD 21 N Microphone – Phototek Canada
Adding XLR output to vintage Sennheiser MD21 microphone - YouTube
Sennheiser MD21-U – Thomann UK
Stream 2. Vintage Microphone Recording. 1961 Sennheiser MD21. Drum overhead and also on Guitar by Martin Mitchell | Listen online for free on SoundCloud
Sennheiser MD21 (1953-onwards ) Fantastic drum overhead. Great on guitar cabs. | Martin Mitchell's Microphones
Sennheiser Promotes Legendary MD 421-II Microphone and Popular HD 200 PRO Headphones at Special Anniversary Prices | audioXpress
Sennheiser MD-21-U Omnidirectional Dynamic Broadcast Mic - Vintage King