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Two Excellent RCA 6BK7B Tubes NOS NIB Black Plates Matched Set Test Strong TV-7
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Amperex 6BK7B 5727 Electronic Vacuum Tubes NOS Untested Mixed Lot 4 Vtg
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Zenith Electron Tube 6BK7B *Not Tested* Fast Shipping
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GE - General Electric Vacuum Tube / 6BK7B / CS2
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GE 6BK7B Test NOS 9400/8800gm Black Plates Copper Grid Fat D Serious Tubes T354
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Vintage (1965) RCA 6BK7B Vacuum Tube NOS/NIB, Made in USA, Hickok Tested Good!
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1 PC GENERAL ELECTRIC 6BK7B ELECTRON TUBE
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GE 6BK7B Black Plates Amplifier Vacuum Tube Tubes Test as NOS
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2 Vintage Sylvania 6BK7B/7028 Cascode Amp. VHF TV Audio Vacuum Tube Valve- Bang
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