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Johnny,
This tube was a grade B rebuilt tube that was pulled from a set, probably around 1981 as that is the date on the carton it's in, it's got plenty of use on it considering the amount of black dust accumulated n it.
The heater works but the gun is dead, I tried rejuvenating but it didn't do anything, I suspect it has an open element inside, the blue and green are OK so it's under good vaccum, I wouldn't hope for much with it short of having it rebuilt.
I have a factory carton that I have used before, it's a little dog eared but should work.
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