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Rca 621TS
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02-02-2017, 10:50 AM
Eric H
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Join Date: Jun 2002
Location: So. Calif
Posts: 11,565
That circle on the base of the CRT with a date code seems to indicate it's a replacement tube, either new or rebuilt, I know they used that style at least as late as 1960.
What are the numbers?
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