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RE: Anyone ever see a grey glass Sylvania 6sn7 before?

You think TungSol made that?

I have no idea, just asking.

It doesn't look like a Sylvania bottle, unless I'm overestimating its age.

Maybe a chrome-dome mated with a metal-base? Or a three way with an NU gray glass?

Edits: 09/04/21

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