NOS Mullard ECC81 / 12AT7 Halo getter Valve/Vacuum Tube - AVO Tested strong

NOS Mullard ECC81 / 12AT7 / CV455 Halo getter VF3 Valve/Vacuum Tube - AVO Tested strong. B3A1 date code, Blackburn 1973 manufacture. AVO NOS Specs: IA = 10.0 GM = 5.5. No leaks or shorts / gas, solid base, shiny pins.

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