12AX7 Sylvania USA Cryo vacuum tube
This is a genuine new-old-stock Sylvania 12AX7, which has matching sections (balanced triodes). Made in USA in March of 1969. The tube features long sized grey plates. It has been cryo-treated, which extends tube life by about 5 times. This tube has the original box and is in mint condition. It has been tested on our calibrated Sencore Mighty Mite VII tube tester and exceeds NOS minimum requirements.