Holland Pope Purotron 6X4
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NOS Vacuum Tubes for Sale | Tubes Unlimited
#1 ONLINE Source for NOS Vacuum Tubes
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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