(!!!) (Best Value Single) ECC83=12AX7 Siemens Halske Germany used/good 1960's faded date code (1.3/0.9ma and Gm=1700/1500)

1 low noise tube) ECC83=12AX7 Siemens Halske Germany used/good 1960's in white box - faded date code

1.3ma and Gm=1700

0.9ma and Gm=1500

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