Vintage RCA 12AZ7 Preamp Driver tube, 1960s, Black Plates USA, Box, Test Strong/Balanced 1960s

Vintage early RCA 12AZ7 preamp driver tube, Black Plates, 1960s, Box, quality made and designed in the USA. It has the incomparable vintage RCA design, craftsmanship, attention to detail, and performance that only vintage RCA tubes can offer. Both sides test over 880, where 640 is minimum good. It tests strong and balanced. These were used as original equipment tubes by many vintage USA tube component manufacturers, Fender, Mcintosh, Fisher, Scott, Gibson, etc. The shipping cost includes fast insured shipping with tracking number. Buy with confidence, see my feedback. Good listening, SonnY :)