unkown tube

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Hello all
I found this tube in a DIY amplifier i bought and all the lettering is gone.
It was an OTL amp
I've taken a bunch of pictures.
Hope someone can help
Thank you

Edits: 10/20/23 10/20/23 10/20/23 10/20/23 10/20/23 10/20/23 10/20/23

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Topic - unkown tube - pennyford 06:17:10 10/20/23 (5)

RE: unkown tube - pennyford 10:46:48 10/20/23 (1)

RE: unkown tube - Jim McShane 18:10:06 10/20/23 (0)

RE: unkown tube - Byrd69 08:47:51 10/20/23 (2)

I think you meant 12BY7. - opalize 09:03:27 10/20/23 (1)

RE: I think you meant 12BY7. - Byrd69 09:42:04 10/20/23 (0)

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