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6BK7B Seeburg -RCA Vacuum Tube New Old Stock in original box
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TYPE 6BK7B DUOTRIODE NOS TESTED - RCA - PRICE FOR 1 TUBE
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LEUZE BK7 KB-092-12000- 6 / BK7KB092120006 (BRAND NEW)
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GE 6BK7B NOS NIB 9750/9300gm Grey Plates Copper Grid Fat D Serious Tubes T335
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RCA 6BK7A 6BZ7 6BS8 TUBES MATCHED PAIR BP AMPLIFIER B&K 747B TESTED
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Vintage 6BK7B RCA Electron Tube Radiotron NOS Original Box Radio Corporation
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Vintage Westinghouse 6BK7B/7028 Cascode Amp. VHF TV Audio Vacuum Tube Valve- Ba
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2 Vintage Philco 6BK7B/7028 Cascode Amp. VHF TV Audio Vacuum Tube Valve- Bangyb
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