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sylvania 12au7 ecc82 vacuum tube black plate tested w tv 7du

sylvania 12au7 ecc82 vacuum tube black plate tested w tv 7du

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One Sylvania 12AU7A ECC82 Tube - New Old Stock / New In Box
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Sylvania 12au7
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Pair (2) vintage 1960s Sylvania Baldwin 12AU7A vacuum tubes - TV-7 test as NOS
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