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This is in reply to Tomcomm's question about the picture tube: It is original and it has not been regunned. Attached are two pictures that I took as a part of the survey of the set when I first received it, hence the dirt! One of the shots was made while I was testing the tube with the Sencore CR-70. I was more concerned with the filaments than with the tube's ID number - so the focus is on the filaments. The tube scored very well during the test with no fall-off in estimated life!
The "NBC" ID is clearly visible below the "21AXP22A". (You were right about the "A".)
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