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Terry,
Too bad the getters are white on that 21AXP22. That surely means there is a leak somewhere in one of the two glass-metal seals. If this is the case there is likely no way the rebuilder can seal this tube to withstand the bakeout heat the entire tube will need in the oven to try to recover the phosphor if that is possible.
The vacuum seal epoxies like you used won't handle the bake oven heat.
If this is true then what you have has no potential rebuild value and therefore is display only. Not much value for an ebay sale I think. Try listing it, you never know.
Who rebuilt your 21AXP22? Was it hawkeye?
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