Vacuum Tubes #1 ONLINE Source for all NOS Vacuum Tubes

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    Cossor 53KU=CV378

    NOS 53KU- Cossor Made 1948-1953 brown base/grey plates- solid round disc side getter halo in original Cossor boxes! The best of the best!  Made by A.C. Cossor / Cossor House Highbury Grove/High Wycombe UK. $899.98 for the matched pair ( Please note: Only one matched pair is left in stock; identical matching at 198mA/198mA)

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