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RE: RCA/Sylvania

Those are the black glass NU. Not a bad tube, but not the equal of the gray glass tube. The color of the coating on the glass is much closer to the color of your RCAs.

The link is one I found with a quick Google. No association with this auction or seller.



Edits: 02/11/21

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  • RE: RCA/Sylvania - Sondek 20:45:31 02/11/21 (1)

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