Nfw, I don't know whether Telefunken made their own consumer microphones or not, but I tend to doubt it. It's for sure that they never made studio microphones; they distributed the microphones of other established manufacturers, while requiring those manufacturers to put the Telefunken name and insignia on them. Similarly, Siemens sold studio microphones made by some of the same manufacturers, branded as "Siemens." Same thing with Philips. Revox sold several Beyer dynamic models as "Revox" microphones, while Studer sold Schoeps microphones as "Studer" microphones. Strässer, a well-known sound system installer in Germany, sold tons of Schoeps microphones--nearly all of them speech cardioids--as "Strässer" microphones. It's what people did back then in central Europe.
The modern form of this is the dozens and dozens of "microphone companies" who all order their stuff from the same three factories in China, jack up the prices by a factor of (several), and sell them to folks eager to believe that each new brand and model really represents something new and different. I suppose that the relative lack of quality control means that each one really is something unique and different--but not in the sense that most of us are looking for.
Now that I've said what I really think--the unusual front grille arrangement of the MK 22 (used earlier in the MK 2H omni) makes the capsule look distinctive, maybe even cool, but as far as I'm aware it is of no great consequence acoustically; it's just the way the thing is.
--best regards
