I have a box of modern 'crater lamps' these were used in faxes before hollow-state went the way of the ghost.
They fire up at around 300v from memory use series resistor to limit current, I will test each one before I send it anyway.
i always intended to use these for mirror drum displays or similar.
I have more than I could ever use so $10 each for NBTVA members.
They have octal bases.
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