>>/66795/
>> I'll take the dynastic, maybe.
Or a gas discharge analog of a stabilizer.
>> Definitely not the emitter.
Maybe a side emitter, like the first lamp color TVs with a kenotron instead of a multiplier, was something in a metal fence. The very same stabilizing anode "something" did not see because it is wrapped in a box of over millimeter steel and touch in the working antiques was not worth it for the sake of interest.