Upton C12 Multi-Pattern LDC Tube Microphone » Sonic Circus
Vintage AKG C12 Large Diaphragm Tube Microphone Klaus Heyne Restoration Serial # 0941 - Professional Audio Design, Inc | Professional Audio Design, Inc
AKG C 12 VR Multipattern LDC Tube Mic #2623: Multi-pattern LDC tube microphone | eBay