Eight (8) RCA 12AU7 NOS from 1949 Made in USA. Boxes are marked as 1949 production, making these 73 years old!
Classic tubes with long black plates and side D getter.
Tubes tested on calibrated TV7BU at 102/102, 111/112, 106/106, 102/117, 110/114, 100/108, 96/104, and 112/98, where 56 is the minimum good value. 86=100%. Very strong NOS for long life.
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