Vintage King on X: "The classic ELA M 251 was only produced for a few years but is widely regarded as one of the best vocal mics around. Upton Microphones has put
Upton 251 Tube Condenser Microphone – Sonic Circus
Upton Microphones 251 Tube Condenser Microphone Telefunken ELA M 251 – Retro Gear Shop