PR NOS Raytheon 6AN8A Preamp Tubes, USA, 1960s, Brand New, Black Plates, Boxes, Ex Sound + Performa

Pr of NOS USA Raytheon 6AN8A tubes, brand new in the boxes, black plates, matching batch numbers, 1960s, incomparable vintage USA quality, design, craftsmanship and performance. They were tested, test new on my B&K Mutual Conductance tube tester. These were used as original equipment tubes by many vintage USA tube amp manufacturers, Fender, Mcintosh, Fisher, Heathkit, Dynaco, Ampeg, Scott, Gibson, etc. The shipping cost includes fast safe insured shipping with tracking number. Buy with confidence, see my feedback. Good listening, SonnY :)