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It is probably good. Not sure what the egg timer is for. CRT emission can be asleep for a couple minutes to a couple of hours in some cases but precise timing is not important, all that matters is waiting till emission eventually climbs which it appears to have done.
On all glass CRTs cathode emission is usually the only important metric. (Other defects usually aren't noticable or can be worked around with an isolation "booster" or similar.
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