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811A Penta Labs High Mu Power Triode Matched Quad (4) Tested,

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Penta Laboratories 3CX10,000A7/8160 Power Triode,

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Matsushita National NOS Boxed Valve/Tube (PCC88 7DJ8) for,

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TAD 6550A-STR REDBASE, Premium Matched,

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el34 6ca7 tube nos nib HITACHI JAPAN power tubes matched,

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